One thing Magical Machete and I have found out is this:
The more people involved in meeting up in one place, the more chaotic everything is, and the less things get done. I've also noticed that the bigger the group, the more people want to split up to do other things...
All this is a warning that, while I think that's an awesome idea, I'm not sure if we would all stick together for the whole day. Magical Machete and I are close friends, but during cons we'll sometimes split up, too.
We really should do a meetup, though!!