1. Since you will undoubtedly encounter bugs, I find it useful to keep a wet facecloth in a ziplock bag that you can use to wipe your visor clean- wash the cloth each night.
2. Don't forget your chargers for your electronics. Some extra clothes might help in case it's cold at night or during early morning starts.
3. If possible, fuel up before you find a place to sleep - that way you can start riding in the morning and cover more ground before your first stop.
4. Bring a camera and extra memory cards/batteries.
5. I usually make photocopies of my ID and put them in a ziplock bag on my bike (somewhere hidden - maybe velcroed to the interior of the fairing or toolkit compartment), in case I lose my wallet - add $50 in that bag for emergencies and also throw in a spare key for your bike.
6. I also bring a small headlamp in case I need a flashlight - it's better when your hands are free.
7. I don't know if you have a tinted and clear visor - but when I go for longer trips, I bring both.
8. I also like to travel with a camelback type knapsack that hold 2 litres of water. It's much nicer to drink while on the go than having to wait for stops. It's really light and doesn't make my shoulders sore like wearing a normal knapsack.
9. I usually bring more than one pair of riding gloves, because the weather can go from really warm to quite cold.
Sounds like fun - ride safe!