My Wife & I will drop our camper off in Homasassa, FL just after Thanksgiving, stay for several days and fly back home to Maine.
We will return to Florida January 2nd. We do not winterize our unit at anytime while in Florida.
Two years ago it got down to 20 degrees one night in Homasassa. Then it rose to 50 degrees during the day. The thing that we had to pay attention to was the exposed copper pipe coming up out of the ground to the sill cock that feeds the camper water. Nothing to do with the camper itself.
I live in Maine. I have found over the years that a 1/2" pipe will freeze before a 6 or 12 gallon water tank. Also, it will be two - three consecutive days of freezing temperatures that will actually create a major problem, such as; cracking and splitting 1/2 inch copper water lines.
Freezing temperatures over night and then the temperatures rising during the day allow the lines to thaw. Hense, no freezing issues.