Hi everyone, we've skied twice before and I've never been brave enough to fill the water tanks -we just used a water butt. Our van is an French chausson 2009 so is probably better insulated than some british vans. The cold water tank is under the lounge seat and we have diesel heating/oil heater when in hook up. Had anyone had problems with freezing pipes? I guess we could leave the heating on low all day but is this necessary. We'll be in the French Alps. Any advice welcome.