It sounds like it's too late for tip #1 which is to make your first RV trip a short one in a campground near your home, and spend plenty of time practicing driving it.
It takes actually using it before you'll know what to bring from home.
#2 would be avoid driving into Boston. Hopefully you have a campground planned outside the city.
#3 would be to allow more time than you think to go from point A to B in an RV. When you say "this weekend," do you mean the entire trip there and back takes place on a weekend? Not recommended.
