Yep, first time I can recall the Sedge House being opened to the public. It is an amazing place, one of very few still left.
I stopped in this duck shack once. (See Historic Aerials image below) They used to leave the doors open to discourage vandals and it actually worked.
I was told that he duck shack was built in the 1950's and blossomed out of a simple clam lease by on of the owners' grandfathers. The duck shack was a full blown house with dockage on one of the cuts in the lower Mullica just before entering Great Bay. My brother-in -law hunted out of there a few times with the owners, even though he wasn't much of a hunter. For years he promised to get me out there on a hunt but it never happened. The owners were taken to court and there was lengthy litigation with the State over this house that ended with the State being victorious. The building was demolished over twenty years ago.
There is still a house out in the Bay close to this one that friends of mine visit regularly in the summer, although it doesn't look like a hunting shack.
There are also a few hunting shacks left in the Glades along Delaware Bay too.