I jut went through somthing similar at robbins pond in East Bridgewater.Someone posted private property signs on the island.Im going to call the tax office and see if somoe bought. It.
There is a guy that goes out there all the time and I think he is trying to make it his own little private resort! Pretty sure that you will find that the land is public. The E.P. are stationed right up the street at Burrage, they may be interested in checking it out.