Gotta agree with akghutton also. We did the 3rd & 4th week in August in 2001. I,personally,loved it.....my DH, on the other hand, will not go in summer again. He's not a Heat Lover & I am.
I loved it so much, DS & I are going back 8/24 - 8/30.
One thing I will say & have said here before. I really think dealing with heat & humidity or crowds is a mind over matter type situation. You have to go into knowing it's going to be hot & that you are going to take the proper precautions. If you go into thinking "I hate heat" you are not going to be a very happy camper.