The game warden around here has a 3/8" flat retangular plate that is welded horizontal to the bottom center of his trucks headache rack. He has a small warn wench to pull critters into his truck bed.
Saw some elk hunters (with a bull elk loaded whole) using a similar set up and a 4X8 sheet of plywood for the ramp. The old man said that it worked really good for loading oryx. My F-150 is set up with a come-along kind of like in the video.
