I don't follow all the info I guess. Are they in a vehicle or on foot? You said "one of our fields". IF they are in a vehicle and going to the same spot, a half-assed GW should be able to catch them even if they vary times and nights. But if they are on foot, never going to the same place twice, different times, different nights, different approaches each time (walk from home and dropped off from vehicle where they can walk home), only 1 shot, cell phone, and in good physical condition....GOOD LUCK!!
