I'll finally be going down this week to get myself a trailer. I'll be getting some other things I ordered as well (tires, helmet, chain, water pump). Can I just not declare them at the border?
If you bring back a trailer, you are looking at $300+ in fees (RIV+Inspection+Tax). If you bring back trailer parts, you have to pay ~$45 at the border + ~$35 for plates. Make sure you are just bringing back trailer parts.
Not declaring a car full of purchases on a two hour trip is a good way to make the rest of your border crossings very painful.