Good luck finding any diveable lakes in south Jersey, the glaciers didn’t make it this far! All lakes in south Jersey are man made for waterpower at long gone mills or for farming to irigate cranberry or blueberry bogs. The one near my house is 12’ but there isn’t anything to see.
For testing new gear or later this summer when training a new buddy I use L Street beach in Belmar, at high slack tide you can find 20’ and if you know where to look, seahorses and late summer into fall, tropicals.