1st long trip,Colo. to New England to Nova Scotia and back.

I am sure you have done your homework on border crossing what you require. Also what you are allowed to cross with. No guns and if you have any criminal record, even DUI you will be refused entry.
I would plan where you are staying in Nova Scotia. If camp grounds are open where you want to go you may need a reservation. I can give you an excellent B&B where they could possibly let you stay with your RV. They are on the bay of fundy side, on the ocean.