I'm not sure if it has been mentioned over four pages, but I carry a small set of pulleys in my pack. A double and a triple pulley set to be specific that I bought at a sailing store because they are lighter and better quality than what the local farm store has. A few years back I shot a 12 point that I knew I couldn't pack out before night fall. Hanging that buck up high enough to drain and be out of the reach of the varmints was really easy with those pulleys. Then another year I was helping the guys process our deer and an engineering friend was using only a single pulley and straining to lift the deer. He must have missed that physics class where they explained mechanical advantage of using multiple pulleys. Look at any crane used for lifting heavy equipment and you never see a single line pull.
