When hunting older-class whitetails you should expect some shot opportunities to occur at first and last light. Outside of the rut, most mature bucks don’t make a habit out of cruising during daylight hours. Your whitetail bow should be set up to deal with this inevitable fact. The best way to do that is to use a peep sight with a large opening.
This will allow more light to reach your eye, making it much easier to see your sight pin when attempting shots at dawn or dusk. You can also take things a step further by choosing a peep with a diameter that matches that of your sight housing. Once you come to full draw, simply align the two circles together for even more accuracy and shot consistency. Any differences in anchor point, or torque in your bow hand, will be easily recognized as the two rings will no longer appear as one. This is vital as the majority of treestand shots place the shooter in awkward positions not typically experienced while shooting flat-footed in the back yard. The chance that poor form will ruin the shot is a legitimate concern.