If I'm by myself (which i usually am) i get the head, or antlers up on the tailgate. then while holding the deers head or front feet on the tailgate i wiggle my way onto the tailgate as well. once you are in the truck and have a hold of the deer it is much easier to slide them on up. The adrenaline of loading a nice buck helps too. I have had to drive back to the house and get the tractor before, in that case i just slide them on the mower.