Yea, thanks Turbo for the 1970's reference. There have been
slight changes and advancements since...
OK, I'm going to throw this out here and welcome anyone to add or provide an option to what I list.
I'm no Turbodish but I have been doing this a long time and instruct yearly to new recruits, new to field unit soldiers and even American Army and Marines who come up to Canada to get their Winter Ops qualifications.
I'm using the current kit lists and SOP's (standard operating procedure) for Canadian Army winter Warfare and modifying it with my own stuff.
Preparation:
Know where you are going and what the conditions are going to be like. You can never assume last years weather data is going to be this years but it's a good start. Historic weather data is an approximation.
Experience is everything. Trust people that have been there, done that and listen to their recommendations and warnings. Yay! internet and adventure forums!
Always bring a map and compass. GPS is great and I rely on my Garmin Rino as both a GPS and FRS radio but I always have a laminated map and a Silva Ranger compass with me as well. In saying that,
know how to read a map and use a compass.
It's always better to have a bit too much than too little. If you have five days food and you get stuck you have... five days food.
No need to overdo it but there is always room for a little more.
Make sure someone knows your route and where you will be (aprox) every day. They should know your return date and you should contact them when you come out. Be it home or the park ranger etc.
Phones are great
but not reliable. The deeper you go the less reliable they are obviously. A GPS phone is great but the cost is something that keeps them out of the hands of most backpackers. Mine is $10 000 a year for full service.
First aid kits are always required. Make sure it's complete and the items inside are not expired. I'm sure the Medic can list the best items to have in one.
Food should be high Carb and protein and you should be able to prepare it with minimal effort.
Water is the most important thing even in the winter. You lose water no mater how cool/cold it is and how little you exert yourself. When you can see your breath in the cold it's moisture leaving your body. You can always carry water purification tabs or a water filter to refill your water supply. You shouldn't really trust a natural water source. Anything can give you digestive issues that may take you out mid trip. Being sick in the bush is horrible and harder to get over.
Gear:
It is true that the better gear is... better. It's more expensive but it usually does the job better than cheap stuff. it's stronger, lighter faster more waterproof, more thermally efficient etc. but it doesn't mean you have to be prepped for K2 to spend a week in Algonquin park.
Usually, you will require better gear when facing more extreme conditions, longer outings or tougher terrain. You can spend a fortune at specialty shops or you can pick up stuff from Army Surplus or wall-mart. You usually get what you pay for but most stuff will get you what you need
if it's in good repair.
Back pack. Try to use a pack that has separate storage for your sleeping/camping gear and other items. It's not the biggest concern but you will find digging to the bottom of your pack in the dark is a PITA every time you want something especially in the dark or when you want it in a hurry. Modular packs with lots of compartments are Key. I have a smaller Arc'teryx Arrakis pack that has separate compartments for gear and is extremely waterproof and a larger Arc'teryx Bora pack for extended use. These are excellent packs but on the high end cost wise. The only packs better IMO are made by Mystery Ranch but I haven't got around to getting one yet.
Anything is good if it fits well,
puts most of the load on your hips and will keep your stuff dry. If you have any doubt you can always put stuff in a
heavy duty garbage bag to insure it doesn't get wet. Even if your pack goes in the water.
Make sure your pack fits well with a load in it. The load you plan to carry.
Tent's. Nothing beats a high end, low profile 4 season tent but again, $$. As long as your tent is in good shape you should be OK. Possibly research how to build an improvised shelter for the worst case. Make sure you have a small repair kit for your tent than can patch a hole, fix a rip and repair broken poles. I have a Snugpak Scorpion 2 low profile tent that works great for me and all my gear. Heavy duty construction fly first tent that doesn't take up a lot of space. Whatever you use, make sure it's up to the task. A four man tent for three people can be carried by the person who trades off some of his stuff so the weight is evenly spread between you all.
Sleeping. I use a Gortex Bivy Bag to insure I have a waterproof layer. It's something you may or may not want but it's a good idea. I can sleep outside on the snow in it. Just putting it out there as a consideration.
Air mattress. In winter, it's better to use an inflatable one that keeps you up off the ground and creates a thermal buffer rather than a foam mattress. I have a tube style Exped matress with a down layer inside that is fairly thick but it's worth it to me. Thermarest is fine as well. Key is that air chamber to limit the cold coming up through the ground.
Make sure you have the repair kit for inflatable matress if you use one.
Bags. You can use a single high rated bag, or a combination of two bags to give you the option in temperature ranges. I have a single -5 bag from Integral Designs and a MEC Raven -12 bag that I can combine when it's really cold. With an air mattress, bivy bag, fleece liner and silk inner bag I have a combination for almost anything.
Make sure you use some king of bag liner. A silk bag liner is best but you can use a fleece liner. the key is a little extra warmth and something that will keep your body moisture from going into the bag.
I will still recommend sleeping in nothing but your underwear and airing your stuff out daily.
Clothing. the key to clothing is layering. Base layer, thermal layer waterproof layer. Venting is important as is changing your clothes daily so they can dry. Again, I'm an Arc'teryx fan as I feel they make some of the best gear but anything can really work as long as it moves moisture away from the skin and is breathable. Lots of socks and two sets of layers (minus the outer layer) is a good idea as a minimum.
Also, key to this is washing yourself. It may seem trivial but a clean body is more thermally efficient and it keeps your clothing cleaner longer. Even if you just wash yourself with baby wipes it makes all the difference. Even how you feel after a few days.
Boots. Very important gear that should be sturdy, fairly light weight, insulated and waterproof. A pair of flip flops for in the tent and going out to pee is recommended and is something you can have on your feet while your boots are off. Flip flops, shoes, whatever you feel you would use but have something else besides just your boots all the time.
Hat, toque, gloves (two pair) sun glasses and other clothing items should be with you as well.
Light. Always bring enough light to do the job. A headlamp and a flashlight are minimal. You can carry a few light sources as they are minimal in weight. Spare batteries and bulbs etc. Glow sticks are cheap and do not require batteries so they are a good backup.
Cooking. Bring a reliable lightweight stove with
more than enough fuel and a cook set. it's also a way to heat a tent or create a dry environment. I use a GSI Pinacle cook set an MSR Dragonfly and burn Naphtha. I also use an MSR microfilter water filter that screws right on to the wide mouth Nalgene bottles. Carry more fuel than you think you will need.
Never burn a stove in a tent if you are all sleeping. Either someone is watching it or it's out. This can be fatal if not followed.
The rest is just common sense, and extra stuff you want to bring for the terrain/type of camping you are doing. I'm sure I have missed a few things like a good supply of small guage rope and bungee cords, muti tool, heavy duty knife clothes pins, sunscreen, personal hygiene items etc.
Feel free to add anything to this that you want but remember, you are hauling it.