I see you live in northern Jersey....The weather we are having right now is very similar to the weather we experienced in August of 2003. We are going back this August and I keep telling my family "this is how it will be when we go to Disney World!" Follow everyone's great advice here. We got an early start every morning and found that the closer you get to a park to opening the easier it is to get on lots of rides. Our morning at EPCOT (NOT an EMH) we walked on to everything! We would drink a lot of water. We also went back to the resort every afternoon to swim and then went back out later. Remember that most of the lines, rides, and shows are in air conditioning. Have a magical trip!