Thanks Duck. I have heard Tex Ritter do "Blood on the Saddle" on other recordings, and Wanda Jackson doing "Tears Will Be the Chaser of Your Wine," but not some of the others. I do know that they were all either popular country songs or folk songs with long roots back in time. Porter Waggoner also did "Old Sloughfoot" (a.k.a., "Bear Tracks"), and he was big on the Grand Ole Opry -- itself a famous variety show with comedy and country songs. The original imagineers did their research.
I actually think that a full re-programming could be done and done well, if they enlisted the help of people like Suzy Bogguss (whose American Folk Songs album is as pure as the wind-driven snow), Ricky Skaggs, Sam Bush, Brad Paisley, Marty Stuart, WSM's Eddie Stubbs or SiriusXM's Kyle Cantrell, or any of the people behind "O Mickey Where Art Thou" (which showed amazing quality and understanding of courntry). I believe that if Disney worked with the right people they could update this show yet keep it timeless. Kind of like the care that they took for the Haunted Mansion upgrade.