In OK yesterday, my dad and I were the only two at the field all day. It was hot, but there was about a 15 MPH breeze that kept us from sweating to death. Made flying a few of our planes a little tricky but we managed to go home with everything we took (in the same orietation too!). Take LOTS of water (ICE water) and sun screen. And if all else fails, sit in the truck for about 10 minutes and cool off, then go after it again!