I don't think carrying LF equipment is that big a deal, though obviously 20x24 is above and beyond! But the bulk is mainly in the lenses and holders; if you're only taking a couple of shots with one lens, I think almost any 8x10 field setup could be carried in a backpack, with the tripod strapped on or carried in one hand.

Remember too that the guys in the video are carrying an 11x14 as well! It seems like if it were just the monster camera, a team of two could make much lighter work of it.

-NT