We went on our very first trip to Disney the first week of August. We got a deal on the room and airfare, plus we don't like to take our kids out of school. We all had a blast! Yes, it was hotter than the sun, plus it was crowded when we went, but we planned as much as we could for all of that and worked through it. That was the only time we could go and that did motivate us to really appreciate it and make the most out of it. A big positive is that everything is in Full Tilt Boogie; everything buzzing and going on while you are in the middle of the fun. And when you've had it up to there with all that fun, many places are open very late in August, so you can take an afternoon break and rest (we slept for three hours every afternoon!)...then get back to it when you are ready and refreshed.
For us a big positive was having everyone truly relaxed because we were on summer vacation... no one had to rush home/ stress about all there is to do when you get back or make up work at school. We felt like we had all the time in the world.
You will have a great time....prepare for the heat, though... it is intense, especially walking around so much. If you stay at a Deluxe, you can't go wrong with that fabulous pool! Staying at a Deluxe is a huge positive to go in August! Have a great trip!