I lost grip getting into a Gorilla King Kong, fell 23 feet, and broke 4 vertebrae. I landed on the roots extending from the base of the tree. Lost over half of my L2 vertebra due to the fact that it burst into 20+ pieces. I've had 5 operations so far and my back is still bent forward at a 40 degree angle at the L2. I'm lucky. I can still walk, but with great difficulty.
In the past, my brother and I hunted out of several homemade loc on type stands that we built. They were made of wood, angle iron, and conduit. They were the strongest, most comfortable, and quietest stands I have ever hunted from. They were also very heavy. Too heavy. We used a pully to hang them. Nowadays, most of us can buy a quality stand as cheap or cheaper than you can build one. Whatever you decide to use, make sure you use a safety harness and lifeline. I assure you the harness is well worth the hassle.
Turpentine