FWIW, last year I had many, many meetings with other AYCJ folks on the higher of the two raised platforms in the T5 food court. It got so bad that I threatened to engrave one of the chairs as "mine" because I was there so often.
As for initial meetings, I'll be flying starting day one - September 7th, though just a quick trip as I will be arriving from GEO on DL and will want to get home for dinner if at all possible. Maybe just JFK-BOS-JFK or something similar. After that, well, the plan is pretty wide open.