Maybe you should back up into the woodline a few yards as they will often watch from a distance before entereing a field or pasture. Play the wind and cover. Background cover around your stand at any given height is much needed, especially at elevations below 18 or twenty feet. And no, twenty yards on the ground is not twenty yards when elevated, but with todays bows, twenty and thirty yard shots are common, and sighting in is pretty simple. I sight in on the ground and have had no problems. I do limit myself while hunting to thirtyfive yards in the woods. I can't see those little twigs anymore!! The new rangefinders compensate for this, but as a bow hunter I personally do not see the need. There are however different shooting techniques that you must do in order to properly execute your shot when elevated, such as bending at the waist and NOT just lowering your bow arm to get your sight picture. Even with SPEED bows, you will never beat a whitetails sense of HEARING, however you can beat their reaction time, especially on shots 25yds or less. hope this helps.