Hey Ya’ll!
PCSkier is right on the money. I followed his advice when I got set up at my winter camp and all is good after a month of winter camping. I am a skier too and we love and live for winter
I did pull the exterior shower hose and handle off and added some insulation behind the access door. It probably isn’t needed but I threw some insulation too behind the fresh water fill door because I could. I thought about wrapping my dump valves but read it wasn’t a worry when the heat is running. I will probably tape some bubble foil to the storage doors just to improve efficiency.
If you don’t have a heated hose or heat tape for the city water, just unhook it and run off the tank.
If you got a tankless water heater, leave it on so it’s built in freeze protection runs.
No need to winterize a unit you are full timing in. If you have power and propane, there are no worries about freezing.
Managing your condensation is what you should devote your energy to. Make sure you don’t have any spots (cupboards, behind the mattresses) that are going to build moisture and mildew if unnoticed. Crack some windows and or vents. Maybe buy a dehumidifier.