It think that it is big enough to have great festivals, but Arizona is HOT HOT HOT even in the fall. I would say come prepared. Sunglasses, sun screen, a parasol, shoes you don't mind getting dry grass on. I wish the grass was green and not dead, for my fellow allergy people don't you agree? I had the worst allergy attack after the taco fest since the wind and the dry grad was a bad combo.