In the areas that I hunt, there' s no option of glassing from a high vantage point so that method is out the window for me. In my experience with mature whitetail bucks, even if you don' t see them, you should know that there' s one in the area. You can definitely tell if a buck is mature or not by the sign he leaves (Size of rubs, tracks, droppings, etc.) I believe that if you' re doing your scouting correctly, you should know that there' s a good buck in the area, even if you haven' t seen it. I also realize that sometimes there are exceptions to this. Good luck on harvesting your mature buck.