One observation from our 6/30 DAH night.
I hadn't much paid attention to the fact that OUAT has been at 10pm for the summer dates so far. That means there's a castle show going on right when DAH starts. Granted OUAT is not a major draw, but it's still a draw and plenty of people stick around to watch.
Selfishly I wish it wasn't during DAH time so people would go ahead and move on out, but day guests have the right to normal entertainment too so I'm not going to complain.
I didn't actually arrive until around 10pm, so had to make my way through that traffic to get into the park.
My first ride was the PeopleMover to eat up some time and let folks leave the park. Worked great!