Most guys use a loading ramp but I need something portable. I'm working on that one. Most stock racks have a lift gate and you back up to a hill or something. If one isn't available, you have a problem unless you've trained a jumper.
There was a time trail heads had a bunker that you could back a truck up to to unload stock.
Like this:
I've never seen one like that in AK, but then again, I've never seen anyone haul stock in a truck up here.