All things good must come to an end! You needed to book right at the beginning of the year for these coveted spots, but you can enjoy the beach and set up a BBQ with your campmates. (though nobody does this, I'm not sure why?)
All access to Montauk via taxis and memory motel, pink tuna, and other great bars and restaurants just be quiet when you come back to campsite, as all other residents have gone bye-bye for the night. Just ask my unwanted house guest at 3am. Peace!