[5] Some sources state that as a young man, Hubbard became a blood brother to the Piegan Blackfeet Native American tribe while living in Montana,[3][6] though this claim is disputed.

[8] McArthur stated "Whenever the sales seem to slacken and a (Hubbard) book goes off the bestsellers list, give it a week and we'll get these people coming in buying 50 to 100 to 200 copies at a crack - cash only.

"[8] Gary Hamel, a former manager of B. Dalton Booksellers at Santa Monica Place, said "Ten people would come in at a time and buy quantities of them, and they would pay cash.

[5] Roy Jr. characterized the book as "a good adventure novel of the West", but concluded with: "..don't look for the true Mountain Man in Buckskin Brigades.

"[11] In a 2003 interview with Publishers Weekly, William J. Widder – author of Master Storyteller: An Illustrated Tour of the Fiction of L. Ron Hubbard – called the book "One of the first novels to present a sympathetic and accurate view of Indians.

"[13] In the book Bare Faced Messiah, author Russell Miller recounts that the Hudson's Bay Company sent Hubbard an honorary case of whiskey after publication and Macaulay had offered an advance of $2,500.