We were there last year at the end of July and are returning this year the end of July. It is crowded, but not nearly as bad as Easter/Spring Break! We live on the Mississippi Gulf Coast, so the heat doesn't really bother us that much. We have made nearing 30 trips to WDW since 1971, and I can honestly say I would not make a trip without Tour Guide Mike!!! Especially during busy times! The information that you get makes all of the difference in the world - even for Disney Veterans!!! What parks to visit when and what parks to avoid is very important information. Tour Guide Mike is very up to date.
Man - I sound like an ad for Tour Guide Mike!!! But his service is great!!
Seriously, I don't think you will be disappointedif you go the end of July. We had such a great experience last July, that when it worked out that July was the only time we could go this year, we had no problem making the decision to go at the same time this year!!!
Donna