The more you talk about your vision, Paul, the more it reminds me towards Go Play NW.
I know folk have talked about GPNW a bagillion times, and imma do it for a bagillion-and-first time:
GPNW is hosted at Seattle University and attendees overwhelmingly stay in the dorms (soooooo affordable for being in the middle of Seattle). A ballroom that’s attached/part of the dorm building serves as a central play space, but there is also the lobby for hanging out (couches!), and lots of cubbies and places to tuck up for quieter playing. People show up to play games, there is a strong culture of “contribute by running a game,” and there are no panels or exhibitors or the like. The schedule includes a big chunk of time to eat an evening meal (because socializing is also important).
Anywho. I will try to resist getting swept up in this just yet. Not that I can resist having opinions. PAX South first. Then PaulCon!