We have a very nice insulated curtain that snaps on for our 2003 Winnie Class C. But I found a large accordion fold silver windshield cover for $1.50. There were also the popup oval window shades for $1.50 for two (end of summer clearance). I bought those too. It was worth a try. They fit perfectly in the driver and passenger side window. The visors hold the accordion fold cover in place.
This all works so simple and quick that I use it 90% of the time. These are quick to put up, to take down, and store right behind the drivers seat.
One time we needed more insulation, so we used the window covers and the insulated curtain. We could more easily maintain a comfortable temperature in the house.
Mike Leslie
2003 Minnie 29B