Tree, fence post, prone on bag (when I was seriously varmint hunting we had two 25lb “shot” bags stuffed with hard styrofoam pellets and tied together with a short piece of clothesline rope (6”?). You could carry them anywhere because of lack of weight, drop in a field, lay one on the other,mount the rifle and shoot. Also worked on the roof of the truck when standing in the bed. The entire point is something that’ll let you anchor that rifle to minimize movement.