I had a deer sleigher, mag size as I recall, that worked well for dragging out deer whole and elk quarters. The problem with using this setup for a live human is the haul rope must be tied directly to the object being dragged. Tying direct to the deer sleigher with the haul rope won't work as the plastic, as rugged as it is, will fail where the haul rope is tied to it.

The deer sleigher would need to be tied onto the human, and the haul rope tied directly to the human, not the deer sleigher. If you are not already injured, you soon will be as you get dragged by your neck or ankle across deadfall, rocks and brush.

You likely will need to look at something with some structure, such as a toboggan, to haul a live human.