I use battery power fans. I put three on my tables, it also helps to fan the fragrance to entice people to enter the tent. I use to do shows in FL during the summer and that is how I managed. Now in NC it doesn't get that hot, but I always carry my fans with me just in case. Also I don't use the sides on my tent, instead I purchased shade cloth from the local hardware store, put grommets on it and use velcro straps to hold it to the canopy. The shade cloth helps the air to flow around but keeps the sun off.