You'd also need to think about parking for vehicles, hotels or other places for people to stay, where they're going to eat or play when they're not at the actual festival, traffic and movement patterns, trash, restrooms, extra police and security, etc.
I could try to help brainstorm for some of this stuff, if you want. I would volunteer Venus and the Avatars to play, since they've been associated with Akemi before, but I doubt they'd be actually able to appear in person.