We have a ORV '13 Creekside 20FQ.Every year at the RV show we see improvements in the model. They have some pretty thick and well made walls now. Lots of insulation. I've enjoyed dealing with the factory. Just because they are the best made trailer out there, doesn't mean there isn't room for mods.
4x4 means gravel logging roads only.
four season means eastern Oregon.
Drying out , unless your install a wood stove, that's going to be tough. A couple of electric space heaters and a big genny might work. With the wet snow we have, look at a Gore-Tex.
Portable solar is the only way to go in the land of the big trees.
Adventure before dementia