i use bushnell yardage pro.
i climb up on the ladder stand a few rungs as our laural is real high.
then i sight for only 30 yards,then i go out and put a red strip of tape on tree.
i do this in circle about 3 times only and mark.

do this a week before you hunt so you dont stink up the woods.

anything inside the orange i can figure out by sight if it is 20 yds or 25 .

never shoot over 30 yards with arrow and only broadside shot.