I've carried 90 pounds. For a mile. On an island paradise. With beer & ice. And nobody was shooting at us. Unexploded munitions off-trail, though.
San Miguel Island in the Southern California Channels Islands NP is such a glorious place that all 9 of us considered a coup against the Ranger, Docent & the Foxy Lady until it was pointed out that the entire island was owned by the Navy and that the Marines would take it back. Unconditionally. So we gave the Ranger a lot of bottled water and butter, and the Foxy Lady ten pounds of carrots for the kit foxes, and left quietly & peacefully.
Taliban don't know what they are up against.
Go Marines!