Yeah I was thinking one of the WMA's might allow it.
Like Drag said, they have ranges at berkshire valley, and black river.
Also Pequest holds a 3D event every fourth Sunday.
Your best bet would be to contact the Division, and justlet them know what you have in mind. They seem to be really open to ideas.
Also, you should look for the post about our upcoming picnic. It will be held when the 3d shoot is, so if you can make it, you should come out and meet some people! It would be good for business, and for the 3d shoot idea![up]