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It does raise a question though that I hadn't thought about before. If you travel in winter with temperatures below freezing, I assume that using the heater for passenger comfort keeps everything warm enough so nothing freezes. However, if you stayed with family or in a hotel for a few days in winter and left the RV vacant, is there anything that can be done short of running the heater? Suppose one drove an RV to winter resort and staying in a lodge for a week. Would you run out of propane (assuming you had propane) or battery for furnace? Would you winterize RV prior to trip and leave it that way while traveling? What do northerners typically do?