What we did on our resent trip from a cold area to a warmer area. 5er is fully winterized. Temperatures down in the teens at night at home. Left to go to Mesa Az. for a 5 day trip the 1st part of Dec. Left the 5er fully winterized the whole time while we was there and back. Used gallon milk jugs for water. We used the toilet, boiled water for dishes & etc. but used campground showers. When ready to head home we drained all 3 tanks and added antifreeze to the traps. It work really well for us and when we got home I didn't have to worry bout having to re-winterize. Plus when we got home it was 8 o'clock at night and down in the teens.