Another thing that i use that i believe could be a lifesaver along with your harness is the
FallGuy safety products by integrated safety.It is a 20ft restraint that acts a lot like a seatbelt.Will not let you drop but yet will let you decend tree while attatched.You can check out there websight along with video at https://integratedsafety.hosting-advantage.com .PS you can by direct from them as cheap as other outlets without paying shipping cost!! Hope this helps to make your hunting safer ,God Bless