That's why we have re-group points and a set area. The idea here isn't that it's just a small cosplay meetup. There's tons of those being held elsewhere. And we're not talking massive splitting up and every person goes a different direction. This is more wandering and being in character and having fun. Messing with the locals. That sort of thing. And my guess is that most people would stick pretty close together, or at least in clumps. Then invade a park or some such place.
Trust me on this. I've been running with the drunken idiots for a few years, now. Wow...come June, it will be three. If the group gets big enough (and by that, I mean more than a dozen people, which seems very likely), it's more fun when you're not all glued together. If that were the intent, I'd just reserve my apartment complex's party room and invite everyone there....
....Okay, making a note of that for my next birthday. Costume party.
Anyway, what I'm getting at is that it won't be wide-spread splitting up. And I'll have set points to come back together. I'm thinking one at the very start, in a park or other public square. Some point in the middle, not sure about where. And end at Jamison Square or something.