Calling in NJ is tough at best because of how skewed the buck to doe ratio is. Most bucks have plenty of does to breed and just do not respond like they do in some other states with a better balanced herd. I think more harm is done by most guys using calls. Like the guy who set up a few years ago 40 yards from me that turned his can over and over for 5 mnutes straight and stopped for a minute and start all over again.
I tried bleating a couple weeks ago - got busted. I never even saw it, but I heard the deer do the heavy breathing thing - I guess it thought something was strange so was trying to identify whatever it was hidden in the trees making that noise People told me I was too early doing it - I guess they were right