We were just in WDW over the weekend, and with the Magic Kingdom opening at 7 am two days of our trip, I was able to get into the park at around 6:50--before the sunrise--on both days.
I came away with a couple sunrise-ish shots that I think are okay, but I didn't have the amazing colors I would've liked. The two big issues I had were: A) the sunrise wasn't that impressive either day, and B) I chose poor locations to shoot.
If you're planning on shooting this at ground level, you're going to have a difficult time. The locations Bob suggested probably would work best, but then you're stuck with whatever subjects happen to be in your frame. I'd also add the Swiss Family Treehouse to that list.
Above all else, though, my point is that if you're really interested in shooting the sunrise, you might consider planning a trip during one of the busiest times of the year. That way, you have more than one opportunity to shoot the sunrise over the course of your trip. With this strategy, you have to contend with crowds, but operating hours are such that you can go to the park for a few hours in the morning, nap, and come back for evening EMH and get just as much done as you would during a lighter time of year.
Last Thursday, I was the very last Guest out of the park. Friday morning, I was the 5th person in. Got a lot done despite it being incredibly busy during the middle of the day. Being able to walk back to BLT to sleep through the middle of the day was great.
I haven't edited my "real" photos yet, but here's a crappy
Instagram photo of what the park looked like at around 6:15 am:
http://instagr.am/p/c30kZ/