Hey Angie: I am trying to figure out the same thing, only from DeKalb Co., TN to Blossom, TX (south of Dallas). I did find someone from TN who went to Sherman, TX (north of Big D) in 1869. Here's the web page so you can read where they went. http://www.tngenweb.org/clay/ClayMigration.htm
They actually went north into Kentucky - go figure that one out. Hope this helps.