I have used full body harnesses for many years in tree stands. Once adjusted, they do not interfere with shooting. I wouldn’t go up in a tree without one. But look into the system called Rescue One. It is a small pack that holds a rope and metal binding system that allows you to quickly lower yourself should you fall from your treestand. If you use a climber, it is the only way to go. Falling below a climber, there are no tree steps to grab onto, and getting back into the climber would be very difficult. I think that this is the best system out there. Cheap insurance for the family and you.