Are you closing the bedroom off from the rest of the coach and using a space heater in there? Other than making window insulation from double foil bubble insulation and bring the slides in for a better seal and less area, I'd go further south. Last winter in WPB was one of the best in the 40 I've spent there with very little need of AC or heat. Other than last week, this winter has been much the same. 100 miles south of Orlando makes a big difference so come on down. You can stay in the Sebring/Arcadia area for very little more than the Ocala area.