X gates might be hard to settle and difficult to get a large enough lot w/o light poles. Used to deal with them when I was a security guard for awhile.
SCH is contacted by local authorities(NYST/glenville PD, etc) for use of old section of runway 15/33 and is actually undergoing construction in that area so it’s going to be highly unlikely. Used to fly out of there quite proficiently years ago and even back then they were very closed to the public for this type of venue.
Plattsburg International??? That’s the old SAC military base. Good luck with that one. It’s like ALB, which don’t allow jack squat.
ACC/SCC would be plausible due to location and type of “arena”. Don’t forget Skidmoore.
Also consider wholesale/resale business distribution centers. Wallmart/Target ones come to mind(target off exit 16, wallmart out by johnstown/fonda). Huge places with plenty of space. not sure who you’d have to talk to.