Don't have a Ghost but on our Phantom we use a simple windshield sun block. It is made of aluminum foil like insulation and fan folds into a compact package that fits behind the drivers seat. They cost about $5 at any auto parts store and many other places. We also have the privacy curtain that we deploy at night. Using both keeps a lot of the heat out of the coach during sunny weather and most of the cold out (of the coach), at night.