I did see that--when I made my grand plan, I figured they wouldn't have fireworks, which is why I chose it. In any event, I don't know that my gang will be there until 11pm (my youngest is 5--even with a nap, I don't know that he'd hold out).
We're going for 2 weeks, hitting 7 parks--I'm sure we'll be seeing plenty of fireworks along the way. My preference would be to spend 7/4 outside all the parks, then getting up early the next day, when everyone else is sleeping in. But, I've been outvoted.