The "father" of the "Quentin" who narrates this story (almost certainly Quentin Compson) apparently joins the hunt on its last day; he speaks to his son several times, and that son also remembers what his father told him about hunting safety (193), so "father said" - the phrase that haunts Quentin Compson's section of The Sound and the Fury, published in 1929, half a dozen years earlier - also appears often in Quentin's narrative here (193, 195, etc.).
After their father dies, Buck and Buddy McCaslin build this "oneroom log cabin" for themselves, and move "all the slaves" into "the big house" - the "tremendously-conceived" plantation mansion - which Old Carothers McCaslin had built for his family (248). Except when they needed help lifting the logs into place, Buck and Buddy "refuse to allow any slave" to work on their cabin, even as they "add other rooms" to it over the years (248).
This cabin is the site of an unusual social experiment, mentioned in The Unvanquished and Go Down, Moses. After Old Carothers McCaslin dies, his sons Buck and Buddy build this "oneroom log cabin" for themselves on the plantation, and move "all the slaves" into "the big house" - the "tremendously-conceived" plantation mansion that their father had built for his family (Go Down, Moses, 248).