I would like to hear from people in the west what they do about cold mountain nights, especially in shoulder season. We will be heating the camper so inside stuff won't free, but stuff like the fresh water connection will freeze. I assume if the water pump is off it won't be pressurized so freezing shouldn't really damage it?? I was thinking of insulating that hose to try and keep some of the heat from the tank. Ideally it would only freeze if the rest of the tank freezes, which would probably take a lot more then a few cold nights.
As a matter of course I assume allowing my tanks to freeze won't cause much damage since not pressurized. Same thing with the tank valves. When I camp in the winter I use a small 2 gallon container next to the sink to wash dishes and stuff. The water runs down the drain into the grey tank and I can't empty it until it warms up, but it hasn't caused any problems. Driving with large chunks of ice in the tanks floating around might not be a good idea, but I am bad about dumping grey water wherever and I don't use the black water so I never have much in the tanks besides the fresh water.