We go every July, and although it is crowded, it is still well worth it. We head over to the parks early, then leave for lunch and a swim, relax, then head back in the evening when the crowds are less and it isn't so hot. The water parks are great, the water is warm, and we enjoy taking out water mouses onto the lakes. Last year we rented a pontoon and the family had a great time. The late hours are a plus, and if you like Fantasmic, the second show is less crowded so you don't have to get there quite so early. We take a spray bottle into the parks to cool us down when it gets really hot, and there are lots of fountains to play in if you want to get wet. Can't wait to get there in a couple of weeks!
Laura