Last weekend we enjoyed an early fireworks display at the lake and temps were at 100(alittle above & below). Our site was in full sun and no trees around. This is the 1st year we could stand to be in our TT through the heat of the day with the A/C actually keeping us cool!(13.5K A/C) I went to Lowes and purchased the heat blocking film(Gila) they sell and applied it to my slide out windows and front windshield. Made a big difference and when it finally gets cooler will apply the film to our bedroom windows(now have insulated shade material). I was skeptical and didn't know if it would do any good or not, but now I know. Believe me applying it was tricky with curved seals around the windows and its not perfect, but I can always go back and remove/reinstall it at another time. I looked at the black film, but I chose the reflective film. I've decided to install film on my home windows, that's how impressed I am. Hope this helps other campers trying to keep cool this summer as we are just starting July.