I agree on the Reflectix. The goal is to have the windows tinted with a ceramic tint (not cheap) however since it is always hot in Texas and my daughter is a barrel racer needed to find some help with heat at her events. Largest heat generator are the windshield and the driver/passenger windows. A fellow barrel racing father got some of the Reflectix for their rv and were very happy with the results.
Purchased a roll, cut to form fit windows and installed for a barrel event in July (outside temp 103 F). Made a huge difference as compared to the previous weekend. Previous weekend the coach got up to 84 F with both units running. With Reflectix installed we could keep the coach at 77 F (set at 72 F).
Now have to figure out the next issue. Reflectix will help with heat at our first LSU tailgate. Our niece is attending LSU. Not sure the Reflectix will help with the "heat" I am going to get due to the U of F Gator stuff on the coach.
Ian, Debi, Shannon, Brendan and Dillan
Plus Fiona a minature Goldendoodle