Parking at Nikon Theater, Jones Beach?

Soon I'm going to attend a concert at Nikon Theater at Jones Beach, Long Island, New York, and I was just wondering how long can I keep my car parked there for? My friends and I want to maybe have a few beers before the show, but I obviously want to wait a considerate amount of time before leaving the venue and driving. Maybe we'll walk around the beach for a bit before leaving just to kill some time and to make sure I'm legal and okay to drive.

I grew up in this area, huge parking lot, plenty of security… Can't just park, and walk away… This theater is situated on the bay. That said, lucky you, have a great sober time!