I'd estimate 20% O gauge, 25% tops.... if all the other gauges went home, it wouldn't hold a candle to York.
But, I still look forward to it every year! Lots to see... many, many, more operating layouts makes it a family event!
I wish they had camping (with hookups) like York.. then I'd make it a 2 day event.
BUT,
First things first... NJHR is right around the corner! (almost!)