I noted that you are searching for the Buck family from Clark County AR. I have a little info about some Bucks there, although I don't know if they are yours. In my Wheat family line, Mattie Wheat Anderson married Tom Callaway and their daughter Eula Callaway (born 1903, died 1926, buried Golden Cemetery in Arkadelphia AR) married Dock BUCK, Sr. (born 1895, died 1983) and they lived in Arkadelphia / Clark County AR. (Note that Dock Buck also later married #2 Ruby Still in 1928.)
Eula and Dock Buck had 2 sons: Dock Buck, Jr. (born 1923, died 2004 in Houston TX) and Thomas Morgan Buck (born 1926 AR, died 2003, buried Hickory Grove Cemetery at Bismarck in Clark Co AR).
I have the recent email addresses of two descendants of Dock Buck Jr., and if you want to email me directly, I will give it to you.