Powering it full time presuming you'll be in the back country quite a bit (I would if I was FT in a TC!) will be a challenge. I'm not familiar with propane freezers though.
Was gonna suggest little chest freezer on a hitch rack but that ain't practical full time.
Not a lot of room in a TC to put a freezer even if you run a generator daily to keep it frozen. Only thing I can think is if you don't use the oven you might fit one in place of the stove and just use a campstove or portable cook top on top of it. And a 120v pizza oven for when you gotta have a frozen pizza or biscuits or ......
