"The Sky-Liners" by Louis L'Amour

Two Sackett boys that I first met in The Sackett Brand  are the heroes for The Sky-Liners.  Flagan and Galloway Sackett are about to head west to make new lives for themselves when they take a disliking to the rowdy way a bunch of riders arrive in a small Tennessee town.  They decide the rowdy bunch needs some settling down, and they make good on their decision, but doing so embarrasses the leader of the riders, Black Fetchen.  
Worse yet, Flagan and Galloway then promise an elderly gent to escort...