Don't take firearms into Canada. You can take a rifle in with the proper paperwork but it's not worth the hassle and paperwork. And don't take any ammunition either. If you have any allow point ammo, I think they consider it to be military ammo and the fine was $1 or $1.25 per bullet. If they find any ammo, or used shells that you might save reloading, they're going to go through your RV because they'll think the gun is in there someplace.
Welcome to the Forum. In the upper right there is a block that says "Jump to Forum". Click on it for the drop down and look for "RV in Canada and Alaska" - there's a whole section on it. Then click on "GO", it won't switching without clicking on it. Spend a lot of time reading.
There are two particular good threads. Read Roll Call Alaska 2015 and last years 2014. I thought there was one for 2013, but I didn't see it when I quickly looked.
Roll Call Alaska 2014 ClickyRoll Call Alaska 2015Bill