Rae!! Welcome to this forum.. Check the municipalities, but I think the only NJ beaches that are of limits are the ones up north where the ammo dumps were. And you need a permit at Atsion Lake.
I'm not sure of the beach names in CM but the lighthouse beach is def. off limits as it is a national park and is marked " no mding". I detected the beach to the right of the lighthouse beach (when looking toward the water). It was good for clad. That was early August. Good hunting
You never heard of Atsion? You MUST visit the place. It is one of the coolest places in south Jersey, only minutes from Hammonton. Metal Detecting is forbidden in the ghost town http://mysite.verizon.net/bjcampbe/sjunpaved/atsion.htm , but is allowed at the lake by permit.