I have hunted for 34 yrs now out of a stand. I am lucky because I have only had one mishap while I was a teenager. It was with a climber baker treestand, you remember them. We have come a long way since then. Every year, I hear someone coming out of a tree with bad results. Last season, I decided that I would rig all my stands with safety lines. I have spent about 25 dollars per set up, but it is worth it. This year is my stepson's first year hunting traditional, he is 15.
I used about a 30 ft piece of climbing 7/16 kernmantle, two screw eyes, and a 5 ft piece of 5/16 kernmantle or bee-line for the prusik knot.
I tie the main line around the tree above the stand and thread it through a screw eye about where you would tie your safety strap. The reason I do this is to make the rope taunt and the prusik knot slides easily on the taunt rope. The proximal rope is tied off on a screw eye at the base of the tree.
As I get to the tree, I attach my hunter safety vest to the prusik knot and begin to climb.
second bee-line prusik
the prusiks are tied with double fisherman's knot
another set up
You can find all rope online from companies like Wesspur aborist catalog.
A 25 dollar insurance policy that everyone should invest in.