I went without a range Finder for Years while Bow Hunting...marked my spots and guess-timated my yardage,missed several Deer that way too!

I ended up getting me a Leupold RX-600 Range Finder...its an awesome piece of equipment and is nice and clear...help me out in being a better judgment of distance and I usually shoot off several distances like You do while in stand so I'm ready before hand if a Deer comes into range!