So my game plan is to show up at 8 am and have a few good open trail runs.
This is the game plan for every mountain within 2-3 hrs of the NYC area. Even on the busiest days if you get to the mountain a half hour before the lifts officially open you will usually get a solid 1.5 hours in before things become too terrible... sometimes more.
I'm always amazed how many people show up around 11 and take a lunch sometime after 12. I'll usually start right when the lifts start spinning and take a break around 11 so I can get back out when the masses head to eat.