I didnt read the 4 pages...
but, their is a chainsaw-along deal you can lift a moose!
But honestly who carrys this stuff on a backpack hunt? Why not use the gutless method and get the first 2 quarters and strap off. Its much easier to move around (roll over) at that point and take the other 2 quarters and strap off...now gut and finish getting the flank/ribs, neck (if you havent boned it out already), and loins. Works like a champ with big critters.
I do have a hitchmaster but have yet to use it so I cannot comment on its use for game. I think it would work well, though I really have no use for it other than to assist hanging meat when I'm alone and so far havent had to use it. A simple truckers hitch with 550 cord can lift a nice hunk of meat if needed.