I keep sunscreen in my camera bag at all times. Also make sure you bring plenty of water and drink it during the show. I have seen too many people collapse at the show from heat exhaustion. I am conditioned to heat because I spend a lot of time outside and in cockpits, yet I still carry at least 2 liters to each show and end up buying more.
Went today, had a great time. Used sun screen and still got burned. I will post some of my pictures hopefully tonight. I tried to get some shots of them in flight but my eyes ain't as fast as they use to be, got a couple though. I fell in love with those F7F's. First time I have bought a "T" Shirt in years from an event. 8)