Who is The hunters from One Man's Wilderness: An Alaskan Odyssey and what is their importance?

Dick refers to the hunting groups led into the Alaskan wilderness to find and shoot big game for sport "the hunters". In late August, Dick observes seven rams feeding on a grassy slope above Glacier Creek. While watching, he hears an outboard motor and sees two hunters heading towards the sheep. Dick watches the hunters, assuming they might kill the rams and leave meat and carcasses behind.