We threw a tarp (silver side out) over our RVan when we got caught in the open in 100+ temps last summer. Our little AC wasnt handling the temps it was 92o and the tarp dropped the temp to below 80. This frightened me since we have our little dogs with us. This summer we also dug out our mister system to take along, but I happened to start looking at little air conditioners and found this little portable floor model with a hose that sticks out a window used on Craig's list. It really cools our small van well all by itself. So far we havent needed it, but we are heading to Florida soon.