I haven't heard of much else my own self. Last year at Nationals we just used electrolytes and hosed horses off numerous times a day to keep their body temperatures down. However, that was in Gillette, I have a feeling Springfield may be very different! We decided previously to not go down there this year primarily because of the length of the trip and because we had done it before but also because of the heat! I hope you get some good advice and have a wonderful time!
**Success isn't a result of spontaneous combustion. You must set yourself on fire.**