Me too.
Spending 12-15 hrs outside at high heat and humidity takes its toll on the old man.
One race last year, I was not disappointed at losing in 2nd round since I could pack up and go home after 7-8 hrs.
After towing an hour with the truck A/C, I felt better. A shower and going out to dinner was a treat.

If it wasn't so humid, I would have stayed and watched the racers I know that were still in it.