I'm relatively new to the forum and we plan to full time starting late next year. This was a question I also had under consideration. I'd intended to mount a small gun safe in the trailer, plus have the portable lock/box for my carry weapon in the cab. Appreciate Trailertraveler posting the USC as I will have a copy of that with me in addition to my CHL.
I guess if we decide to go to Canada or Mexico we'll figure that out at the time.