How are the crowds in the water parks in the afternoon? We have always gone in the AM and found the first 1-2 hours to be really good before the crowds picked up. We are considering doing an afternoon session in one of the water parks in late August. We would be there from around 1-5 when the park closes. Do the crowds really thin out the last hour or two or will it stay crowded till closing since it is the summer? Thanks.