Kyle, and his mommy, are right- conditions change really fast. Last year the first two days were somewhat cool and windy, and then Saturday it was around 100!
Besides some of the stuff you and Kyle have discussed, I would suggest you consider bringing helmets. Not that you need them all the time, but there will be a few places where you sure would want one on if the machine ended up on its side. Better to hit the rocks with a helmet rather than your grape!
Oh, and of course, a cooler with water, lunch, etc!
