We go around that time every year, including this year. I'm a teacher and am limited to busy vacation times. Yes, it's hot and crowded. We always try to get to the parks at opening - it's not as hot or crowded and you can do so much in that first hour. We use fast passes and basically won't wait in a line that's more than 10 or 15 minutes. Normally we have lunch at the park (love Columbia Harbor House in MK), maybe do one or two more rides, then head back to the hotel for an afternoon at the pool. Later in the evening, we often head back to a park (not necessarily the same one) for a few shows, maybe the parade or fireworks, whatever we feel up to. If we're too tired or lazy, we may just hang around the resort in the evening. Be sure to drink lots of fluids and rest in the shade when you feel the need. While I would love to go when there's no crowds, I have a feeling it wouldn't be the same for me! Don't think I've even been there during a slower time.