Since I haven't been to the scene, I really can't tell.
I do know that there were parts of her body (hair, entrails) drug around the scene. There were drag marks that were 'greasy' in consistency. The ME and others on scene said it looked like animals had drug off pieces of her. I don't think they thought the body had been drug by the animals (to under the tree) but that is what an animal might do (like a coyote) to keep it from view of birds of prey.
I really can't tell you how they theorize the body was brought to it's location from the NORTH, though.
Just being honest.