Bruce Nichols in Guerrilla Warfare, Volume 4, Page 104 tells of the rendezvous of various bands on the morning of Saturday, September 24 "in the hills along Bonne Femme Creek six miles south of Fayette near Cherry Grove School". One of the references he cites is "Babe of the Company, An Unfolded Leaf from the Forest of Never-to-be-forgotten Years" by Hamp B. Watts. (https://digital.shsmo.org/digital/collection/amcw/id/15606) Starting on page 15 Watts describes this incident and follows with his version of the raid on Fayette. He says the guerrillas "sought shelter in the barn on the farm of widow Turner (now owned and occupied by Mrs. Sue Miller)." He gives the date of the meeting as September 19 and the raid date as September 20 which were apparent errors. He says the rendezvous was held "three-fourth of a mile west of Cherry Grove school house, six miles south of Fayette, on the farm now owned by Mrs. Sue Miller". In the 1897 Standard Atlas of Howard County (https://digital.shsmo.org/digital/collection/plat/id/6897) the Detherage farm is owned by Susan A. Miller. Widow Turner was likely Elizabeth Turner, age 64, on the page following William Long in the 1860 Federal Census.
I believe that we have located the site of the scalping of the guerrillas.