condenastion or leak in corners?????

We spent the winter in southern Alabama and had condensation problems with rainy days or severe temperature changes. We left our three roof vents open about 1 to 2 inches which helped with the windows greatly. Also left the doors to the wardrobe open as the outside corner of it would be wet. We lined the wardrobe with insulation, hope it helps next winter. We used two electric heaters for heat and did not notice leaving the vents open to cause camper to be chilly.