Ski camping and some winter travel here. No problems with condensation even in single digit temps and sleeping in penthouse top. Heater is set at lowest temp, keeps interior in mid-40s. We might kick it up in the morning and crawl back in bed for a bit. Or, get breakfast cooking. That gets the van comfortable. In our Westy and Lance, cold condensation drops on the face woke us up. We used ice chests in the Westy to keep things from freezing. Again, we are in a dry climate though we have spent some time in the upper Midwest in similar temps.
“Often bumpy roads lead to beautiful places. And this is a beautiful place.”
— Dave Martínez