Regarding cold weather: I spent a weekend camping last winter, and it got to 9° one night. No problems. I had the thermostat set to 62º, and we were comfortable all night. Raised it to 70° when I got up, and it warmed right up. Graywater tank valve froze, but if I had thought to put some salt down the drain, that likely would have kept the valve from freezing, also.
It stayed below 25° the entire second day. We were never cold, as the heater kept the inside at 70° without running all the time. No water lines froze. In our 2417, the fresh tank is in the same compartment as the water heater, so it stays warm enough to not freeze. All other pipes/hoses are inside the unit, and insulated from the outside. I see no issues with camping when it is freezing, unless it stays below 15° for a few days straight. Even then, I cannot say that there would be problems.
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