Heading out Tuesday morning for the last camp out of the season! Going to Mark Twain National Forest for a five night stay, bringing family and 4 wheelers, going to be a blast! Question here is this: Fiver is not winterized. We are leaving Tuesday morning with a morning low about 20. Fiver is in my heated shop, so when we head out all water lines will be warm, but as we travel it MAY eventually get into freezing temps inside, till we get to high into the low 40s later in the day. Can I just leave my furnace running while I travel? Is this a recipe for disaster? Considered blowing all water lines out with air and dumping antifreeze into traps, but have no way of repeating this process for the return trip home. This trip should take about 4 or 5 hours total, with an all season camper maybe I'm worrying about nothing? Any and all thoughts/ advice welcome here. Thanks in advance, Larry