First: For all those who do not live on L.I., SHUT UP!...because you're making me jealous (kidding).
Seriously though, this is a very important subject to me as well, as I am very disappointed to see the local governments continue to enact control, restrictions, regulations, etc., that adversely affect waterfowlers.
For the record, in NY, local towns can (and do) claim jurisdiction, control, and law over the waters within the towns. Many towns even have their own marine law enforcement, and there's no "right to hunt" clause in our Constitution that prevents local governments from restricting it.....unfortunately. For example, the Town of Huntington has enacted a complete ban on the discharge of a firearm. So, figure out a way to waterfowl hunt without discharging your shotgun, and you're good to go.
I'd have to say that researching all the regulations, restrictions, laws, etc. for WHERE I'm allowed to hunt on L.I., was perhaps the most challenging aspect of this sport.......and it shouldn't be. Luckily, most towns post their code online, and Google Maps/Earth is an awesome tool for research/planning.
I'm a relative newcomer in this sport, but I hope to be able to continue hunting for the remainder of my days............as long as we continue to be "allowed".