You are allowed some alcohol and even if you are over paying the duty is still worth it. Travelling to a foreign country so no guns or ammo unless you are on a hunting trip. Remove sunglasses and shut off your engine when you get to the front of the line. Same procedure when going back.
DO NOT MISS QUEBEC CITY. The KOA on the west side of town is a good spot to stay. You can take a shuttle into the city. Suggest a bus tour first and then walk it. Great city. Great culture. Our favourite city in Canada.
Enjoy your stay. Welcome to Canada.