Back legs up.
We've got a deer hanging pole that swings out from the wall inside the shed that has an electric hoist mounted on it. Just back the truck it, hook up the legs, and push a button. MUCH easier than hoisting by hand in a tree. By the time we hang them, there's not much blood left after field dressing and rinsing the body cavity with water. What blood that does drip out, the dogs take care of rather quickly.