Hello everyone! Another newbie question. I will be leaving from northern Michigan on Monday traveling south to Texas and then on to Florida and it is cold here....-8 tonight .... when I leave I would like to put water in my fresh water tank to use on the road but being so cold I was wondering if I would be wise to leave my heat on while I travel..it is going to be in the 20's on monday and I plan on traveling far enough south so it isn't freezing before I stop. My system is winterized at this point with RV antifreeze. Any thoughts.