Hey, when you are shotting long distance w/ a rifle llike out to a couple hundred plus yards you use yardage markers in the form of a stake and some clothe llike material to blow inthewind. Why don't you set this up at your stand site? I would (if i was as concerned as you are) start at 20yds then 30yds then 35,40...prob.would not go much further than that..good luck.