RJSit10’s review published on Letterboxd:
Now Available on The Film Detective Service.
Of all that is ridonkulous about this motion picture, let's open with... It's a Sequel. So it's on you if you haven't seen Las Vegas Hillbillys.
This is mostly a country-western concert set for no reason at all in a Get Smart episode on a Scooby-Doo set. So enjoy that. I recommend the first 15 minutes for sure, just to understand that this is really happening. From there, you can advance to the song bits, particularly for the dream sequence number "Gowns Gowns Beautiful Gowns..." which seems like it was written for an Industrial that never materialized.
Cameo Alert: Young Merle Haggard!
Other reviews are recommending the RiffTrax version, and that seems like good advice.
Film detective has both Las Vegas HillBillys and Hillbillys in a Haunted House. Take 2 and call me in the morning.