Don't try to carry any firearms into Canada. They will confiscate them. Fortunately I learned this before the trip.
Returning from Canada to the USA got a little hairy. We were waved through by the Canucks, and then stopped at the US border station. They took our new passports to look them over. Then they came out and asked my wife to go over to the office and sit on a bench.
They had me get out of the truck and go around to the rear of the camper. They stationed themselves at widely separated places behind me, unsnapped their holsters, and placed their hands on the butts of their pistols.
Then they told me to open the door. When I did so and they could see that I had no passengers, they snapped their holsters closed and told us to get back in the truck.
One of the agents came up to the window and handed my wife the passports. He told us that we had failed to sign them. That was true. That was also what aroused their suspicions that something was wrong.
Tom