I found something similar once around the lake Morena area in some trees during archery. There was a small what I would say cage or trap I am assuming made from sticks and it was sitting right in the middle of the triangle of strings and small pouches like that tied around. Seen some stuff tied to bushes in Mccain also.To be honest it is kind of creepy when your by your self miles from any road and you are not packin lol