I found that using an infra red thermometer enabled me to find pockets of heat that grew and spread over the course of the day. Using small (12x12) box fans move that air. As I have basement a.c. I also put one on the floor about three feet in front of my air return. With the thermometer I saw that air was still plenty cool. The most important discovery was the sky lights. Especially in the shower. I cut reflectix in the shape of the skylight and attached it with heavy duty Velcro in key locations so I can remove it at shower times.
It is always easier to maintain a cool space then it is to create one. I have been in triple digits many time with MotorHome club and invited people inside who were struggling and they told me that inside my rig was "cold enough to hang beef".
