I have thought about this question for awhile and have a different answer than most. The easiest deer to kill in my area is any deer that crosses a trail over a deep woods creek. Even mature deer are totally distracted within 5 yards either side of the creek then are extremely susceptible when they take that momentary walk or short leap over the gurgling water. The dense woods make them feel very secure in the first place. Set up overlooking a deep woods creek crossing and you may never hunt anywhere else again.