We usually head south to Florida at the end of January and return about the first week in March. Wish it could be longer, but DW misses the adult kids too much. Because we are home for much of the winter, and returning to sub-freezing temps. we do not de-winterize in the south. We just take gallon jugs of water with us for cooking and drinking. We use campground water in the empty gallon jugs to flush the toilet and other non-consumption uses. As noted by another, I don't like to winterize/de-winterize more than once per season.