What does "pack a buck for miles" mean?

Question

I am reading "Where the Crawdads sing" and I stumbled upon this sentence "pack a buck for miles". Does this mean some money (e.g., US dollar)?

"The Land . . . being marshy and Swamps, we return'd towards our Ship . . . Discouragement of all such as should hereafter come into those Parts to settle."

Those looking for serious land moved on, and this infamous marsh became a net, scooping up a mishmash of mutinous sailors, castaways, debtors, and fugitives dodging wars, taxes, or laws that they didn't take to. The ones malaria didn't kill or the swamp didn't swallow bred into a woodsmen tribe of several races and multiple cultures, each of whom could fell a small forest with a hatchet and pack a buck for miles. Like river rats, each had his own territory, yet had to fit into the fringe or simply disappear some day in the swamp. Two hundred years later, they were joined by runaway slaves, who escaped into the marsh and were called maroons, and freed slaves, penniless and beleaguered, who dispersed into the water-land because of scant options.

Answer 1

A discussion on Reddit some years ago suggests that “pack a buck” means carry a male deer, as animals killed for food needed to be transported to wherever they were to be processed.

A few paragraphs later, it’s noted that this swamp-land area included “fatted deer.”