there are plenty of wildlife management areas that have excelent duck and goose hunting.
season just ended a little while ago so you have a ton of time to check places out and do some scouting in your area
start at the NJ fish and game website http://www.njfishandwildlife.com/
there you will find some great articles on waterfowling along with the regulations, zones, WMA maps, etc.
reminder waterfowling is nothing like upland hunting or deer hunting. things have to be planned out to the T, do your homework. especially in New Jersey.
once you have done some legwork feel free to ask more spacific questions. reguarding how to setup certain areas, decoys, etc.