Hang the deer head up.
Slit the skin from the sternum to the head and then slit the skin around the neck below the head. Try not to cut into the meat.

Pull the skin down about 6 or 8 inches. Enough to put a golf ball on the hair side and form a knob that you can tie a rope to. Tie the other end of the rope to a car, truck or 4 wheeler. Drive away slowly. The skin will peel right off. Use strong rope or you make end up with the deer on the ground. I had to slit the skin on the front legs but I don't think you have to if you have a strong rope.

Good luck.