[kozzy]

I have camped in the winter, its actually pretty hard for a good amount of water in the tank to freeze up, unless the temps are well below zero. if you are above 0, and are using your furnace, your tank will be fine with about half of water in, especially if you are driving, with it moving, it cant freeze. Now your water lines, that's a different story, much less water, less area, those will freeze up first. Watch the weather and temps, see how much you will be moving, and make a call, as long as your smart, and careful, and use some common sense you can safely use water in the winter....as I said, I have done it.