"Boots and Saddles" I wasn't familiar with. I found it on Amazon, looks to be a Gene Autry movie and it's been released on DVD

Gene Autry DVD Collection #4 - Boots and Saddles/Rootin', Tootin' Rhythm https://www.amazon.com/dp/B001TLI40W/ref=cm_sw_r_cp_apa_i_.EGuCb20Q5E4Z

Or for free on YouTube https://youtu.be/GNfzbucCWsE

Edit : This isn't what your father is thinking about. There was a TV series from the 50s called "Boots and Saddles". It ran one year 1957-1958