That is one of my favorite episodes. I just finished watching it on a $1 DVD, since that's all I can afford, now. I hadn't seen it, unedited, since local channels cut it for added commercials. It's wonderful!
But I was searching for trivia regarding the ep:
Does Lucy wear a short-haired wig, when emerging from the Marine Corps barbershop, or did she wear a wig all the rest of the time? Her beautiful red bouffant swirly-hairdo does look too perfect -maybe that was the wig.
But maybe BOTH were wigs?
Maybe the Gomer Pyle set would be worthwhile, though. I recall Jim Nabors parlaying his smash hit "The Impossible Dream" into an album of the Man of La Mancha, because I knew he actually played it in some theater, somewhere.
I could never find it, though.