When we were getting ready to leave our upstate NY cottage after the holidays earlier this month, the temps were running around 10-15 deg.F, so I fired up the two furnaces a couple of days ahead of time running on an external LP tank. With the temp set at 55, the coach was warm enough to start packing freezable items inside in a matter of hours. The day before we left, I hooked up the hose and filled the fresh water tank plus bleeding the air out of the lines and filling the water heater. At night, we left the cabinet doors open to keep them warmer. The morning we left, I cranked the temp up to 68 deg.F. On our trip south we saw freezing temps, at least at night, until we reached southern VA. We never had any problems with the pipes freezing or keeping ourselves warm.