Quick notes for surviving a winter blast while Rving. Foam tube wrap and heat tape on the water line, (if connected to city water). Full skirting around the RV, and a fiberglass insulation piece taped or wired to the bottom and sides of the holding tanks. If you have an exterior drain valve, wrap it also.With windows, have that silver reflective cover that's used to keep the sun off your dash of a car, but face the silver inwards. Use small towels also along the bottom of the windows to catch the condensation. On tiled or wood floors, have several throw rugs to help insulate the floor and to retain the heat. And Never ever use your stove or oven to heat the inside. Poisonous gasses will accumilate because they are not vented heat sources. Use a small electric fan to circulate the air inside to distribute the heat. And finally use a heavy blanket to cover the door on the inside.