http://www.cleverscampcamp.com/camping-montauk-point/

Montauk Point, Long Island, NY – Camp Hero: Does anyone know the way in to the bunker sections?
Montauk Point has the lighthouse, but just before it is Camp Hero – the decommissioned military base that’s now a public camp-ground. It’s got that radar dish.
Anyway, you used to be able to get into the underground sections – the old areas. It was COOL. Does anyone know a way in?
C’mon – nobody knows?
im sry i really dont know, but why not ask the camp, jsut call them up and ask, be like how can i… you’de be surprised on what you can find out, and what can be done, idk if this helped like you wanted it to but goodluck teehee