Thanks a bunch, man. I'mma head down there at the crack of dawn tomorrow to see what I can get started.
As for the factors for coming, I don't at all see 16 as a problem. Of course, since most of that 16 would be other people who'd want at least 16 people to come, there'd just need to be mutual agreement to come, i.e. whatever carpools commit to coming so there'll be a minimum of 16. So far, Kaylee (Scout) said she'd bring a full carpool (5, I'm guessing), Jamn said he'd bring at least 4, and assuming you guys'd bring 5, that's 15 of the bat, plus any indigenous randoms (lol) that show up.
We'd need to figure out the housing situation though. I can comfortably fit one carpool at my place, so we'd need to secure housing for the other two/three. If push comes to shove, there's an awesome motel down the road that's only 75 or so a night. Split between 5 people or so, that's $15. I doubt it'd have to come to that, but at the very least, it's a reasonable alternative.