Dick_B wrote:
My water lines froze one winter (dumb me) and I would not want that to happen again. I question whether there is such a thing as a 4 season RV and, even if there is, are there 4 season campgrounds where the work is?
This is key. I too have a Rockwood with heated tanks and an enclosed underbelly. That said, I've never turned the heated tanks on, as I've never actively camped under 32 degrees. Based on camping we've done where it dropped into the 30's overnight, I expect we'd be fine for a few nights below freezing, but I wouldn't try to camp in WI in January.
The secondary question, however, is where you will be in the winter. I'd have no concerned camping in FL in the winter, but the only WI campgrounds that I know are open in the winter are those with year-round seasonals, and even those don't have water and sewer available in the winter. For a full-time setup, that could become an issue if you are in the north.