There's a lot of variables to consider, temperature, wind, etc. You can always winterize and drain the tanks and lines while it's still comfortable to work outside. You could continue to use the camper, just stay in campgrounds with restrooms and use water jugs for water. If you are using the camper 'wet', be sure to leave cabinets or closets that contain plumbing open to the room heat. A couple of incandescent light bulbs can add enough heat to keep pipes from freezing. Also you'll want to check how your tanks are heated. Often a duct from the hot air furnace is diverted into the space. That's fine, unless you try to use space heaters in the RV to save on LP gas. Then the reduced use of the furnace could cause cold to seep into the tank area. We have a couple of wireless thermometers that we monitor the refrigerator, but in cold weather I usually move one to the wet bay to check temperatures there.