I would say definitely with the right van build. I lived in a self-converted van for two years with my partner, and we spent both winters ski bumming in the Nor

I would say definitely with the right van build. I lived in a self-converted van for two years with my partner, and we spent both winters ski bumming in the Northeast US and Colorado. We saw temperatures down to -14F and could keep the van a balmy 65 inside. We heated the van with an externally exhausted 16k BTU propane furnace (blew dry heat) and that thing could really crank out warmth. As for showering, we never did in the winter because external grey tanks freeze. We did have a showerpan embedded flush in the floor so it didn't take up any space normally day to day. We would just have to set up shower curtains around it before we did. I actually showered more outside of the van for that reason. Mostly we would just clean ourselves with hot towels for a few days before we had to wash our hair.