The easiest way I have found is using my climber in order to hang the stand. I use the climber to climb to the desired height, then pull the lock on up and hang it just above. My hands are free and I have the same freedom of movement as if I was standing on the ground.
On trees that I can't get my climber up, I'll use the lineman's belt like the others. But I much prefer using the climber. Much easier.