I would deffinatly not use the owl hoot anymore. He has probably learned to avoid that call. I would try either a crow call or even another gobble call as suggested before. Also, once he gobbles, dont start any agressive calling. Just the occasional soft cluck or purr. If hes really that call shy, then hes already heard the agressive stuff and will most likely hold up out of range if he pays any attention to the calls at all. Also, I assume its just as thick in NY as it is here in PA, so sit yourself down under some good cover and be ready to shoot as soon as you see him. By the time he comes into view, he could already be right on top of you.