I have a tract of land I manage that is approximately 4 miles by 3 miles in size, about 7,000 acres. It isn't fenced, but I would bet you could hunt on it for the entire season all day, every day and you wouldn't have much success unless you baited or took every adavantage you could. It is basically 100% pine thickets you can't see over20 yards in unless you are on aroad. A fence around a tract that size wouldn't make any difference to your hunting succcess.