What tether would you suggest? Length??
Can I use the carabiner that already have or do I need something else?
What other accessories would you suggest that I get?
Where’s the best place to buy the stuff that I need?
Thanks for your help!
https://www.backcountry.com/petzl-connect-adjust?
Ladder, climber or hang-on?
Once in the tree, attach it about head level & have just enough slack to sit.
snapcrackpop's Link
I have since added a small thin piece of line that holds the carabiner fast to the tree, thus not allowing the tether to slip down the tree behind me. One end is attached to the tether with a hitch that holds under tension, but will slide when slack. The other end is a bowstring loop(that is used by catching it on the carabiner) that I can shrink and draw tight with. When the tether is loose the loop can be enlarged and is basically reset for the next use. At the moment I don't have a picture, but after Thanksgiving I am certain I can then post it here. In effect the small line pulls the carabiner to the tether line going around the tree, thus bridging the joint where the carabiner goes around the tether.
With regard to the waist belt and flipping upside down. It won't, and can allow you to hang head down, such as, when you are unconscious. Most of your body weight is above the waist, if you have one.
http://www.survivalworld.com/knots/bowstring-knot.html
This is a site which shows the bow string loop knot. It starts with an overhand knot, but I have since learned that it works better by starting with a figure eight knot. With the overhand knot, depending on the line material, the overhand knot can slip along the line and change position, the figure eight will not do this. I've never had the loop slip and need a stopper knot in the end of the line as shown, but is does make a handy spot to pull the loop smaller. To open the loop, remove tension and spread the loop from the sides. The loop knot is strongest when the loop is elongated(as on a bow tip) and weakens as the loop widens. It also works as a tension knot for tying down loads.