Santa Monica College does a pretty good show the Saturday before the 4th. I run into some friends there that I only see once a year, and another friend is on the pyro crew ... so I'm really sad I'll be missing that while I'm camping in the mountains.
But it's another

officially-recommended 4th of July Fireworks Show.
ETA: Heheh - I watch 1776 every 4th also ... what are the chances of two such geeks posting on the same message board?
Yes, I know there is a significant geek population here ... but American-Revolution-Musical-Theater geeks are unique