Just wanted to reiterate what Chelle said. Get the handicapped pass, it will cut your time in the sun tremendously. I've lived near disneyland all these years, always took my cousins there whenever they visited and suffered in the heat. Never knew that I could have gotten a handicapped pass until the last time I went we got one for my sisinlaw who had just had hip replacement surgery. You can even rent an electric scooter or wheel chair. The heat has always kept me from doing things I have wanted to, now that I'm aware of this I won't be so hesitant to go have fun.
Keith.