Here is a site to get maps for Wildlife Management Areas in New Jersey.
http://www.state.nj.us/dep/fgw/wmaland.htm
If you are a native of the state you can probably figure out where they are, then match them up to Google Earth. Figure anything not in the WMA boundaries would be private property and just take some general GPS coordinates to get a decent outline of where you would be on public land and where you would be on private land.
But easier would be to talk with the local county assessors office and find out where you can get property maps for the area you want to hunt.
