Backpackers spend most of the day on their feet and most do not carry the extra weight of a folding camp chair. YouTube user Econo Challenge came up with a portable lightweight design for a backpacking camp chair that uses dead wood found at your campsite.
The chair design involves using a lightweight piece of nylon with a hoop sewn at one end and a drawstring at the other. This weighs little and is easily packable. When you reach your campsite you will need to find three wooden poles that will support your weight and are a bit taller than you. Tie a cord around the one end of the poles and set them up in an a triangular frame.
Next find another pole maybe a metre long and feed that through the hoop on your nylon chair seat and tie the drawstring around the top. If you don't want to make a nylon seat you can use a burlap coffee sack or buy a premade seat directly from the YouTube user at his camping site