Cold weather camping

We do quite a bit of dry camping in cooler/colder weather. Here's what we do with out 36 DP. We never put out the slides at night, too much heat loss and cold gain. I put insulated square in all of the ceiling vents, great heat loss and cold gain through the plastic covers. I put a number of throw rugs on the floor even over the carpeting, it helps to keep the cold from coming through. We use electric blankets if plugged into 120 or if the genny is running. We always use one or two 1,500 watt electric heaters. We never use the propane space heater, it uses too much propane, it's too noisy and takes the batteries down too fast. We put heavy windshield sun visors over the bedroom windows to further insulate. Have a cocktail and crawl in be with your Honey!!!