"They had an ingenious idea that worked real well on the open but rocky portages. They had brought along a Game Carrier, that you would normally use to transport deer sized animals in the field. The handicap person sat looking backward and one guy was on the handle and another walked behind too stabilize or assist if there was any problems."

a game cart is illegal to use within a designated wilderness, as is a mountain bike, sailboat and similar "mechanical" conveyances.  I'm assuming there is some exemption for a wheel chair under ADA? - possibly a game cart could be considered a form of wheelchair in this case, but
anyone considering that should check with the forest service.