The two choices:
Get up early in the morning, rush to the park, stand in a HUGE line and wait for the rope to drop so that I can enjoy an extra hour.
OR:
Visit a park of choice in the morning, take a break, sometime in the late afternoon take a relaxing ride over to Magic Kingdom, have no lines to wait in to get into the park. Enjoy supper or head straight for the rides. Then, when a large group of people has to leave the park because they are not resort guests, I can stay and enjoy the park for an hour longer.
I'd definitely pick the second. I don't have a problem getting up in the morning, but I'd much rather sleep a bit longer. I'm definitely a night person. Now the only problem I see with the night time EMH is how do you get the non park guests out? I'm sure they have it figured out because the work out EE just fine. DH and I tried to be one of the last people out of MK in January. It just didn't happen. We were there an HOUR after the park closed, and still there were TONS of people all over the place.