My source for "Colonel" Castleman that you read in my 1862 book on page 124 was the 30 August 1862 issue of the "Rolla Express" newspaper, in an article entitled "Collission." This is listed in the endnote # 40 for the page 124 entry which is on page 224 in the back of that book.
On your other question, the only men I saw listed as members of Crabtree's cadre or staff were Wiley Shumate (who led the band in the summer of 1864) and the Captain Reves, both mentioned in "Judge Jenkins' History of Miller County" of 1971 on pages 385, 426, and 428 (the judge's history has no index). Other recruits of Crabtree's unit included Mark Jones, Thomas Williams, John Bond, and Hannah J. Jenkins on pages 426-7, and James Shumate on page 428. John P. Wilcox was a band member when Wiley Shumate was leader in summer 1864, and Wilcox was captured (page 437 in Jenkins) and publicly executed in August 1864 at Jefferson City (from other sources than Jenkins).
My father-in-law remembers a Maples at McGirk who rented a house owned by the two Cook men in the late 1950s and early 1960s, and Mr. Maples bought this house from the Cook brothers after renting it for a while. Mr. Maples paid his rent at the bank in California. Dad remembers Mr. Maples as a "good" renter, that gave him no trouble. My father-in-law remembers the oldest Maples child as a girl who later was a missionary and he seems to recall died at a relatively young age. He recalls two younger Maples boys, but no details. I suppose you are one of those boys, yes? Perhaps my father-in-law may remember more about the Maples family later, but maybe not.