Just a little historical tidbit:
French Canadian Voyagers were expected to carry, with a tumpline, two "pieces" per trip on each portage. A piece weighed 90 pounds. They would carry this, bent over, and at a trot.
One local voyager, Pierre Bongo, held the historic record of carrying five pieces one mile. Pierre was part Ojibwe, part negro, son of a slave freed by his master who was a British officer at Michillimacinac just after the French and Indian War. Bongos (or Bongas) still live in our area.
PG