This is a simple but cute episode which includes a small-amount of time-filler. I don't see the "hippie"-premise as dating the entry in any negative-sense. It's fun for someone of my generation, a late-50s baby-boomer to be reminded of those long-ago, socially-tumultuous days in the late 60's. The filler to which I referred is a scene where the 3 hippies and Gomer sing a popular folk-song of the era, Bob Dylan's "Blowin' in the Wind", providing a low-key chance for Jim Nabors to sing. Although he clearly had a good, strong voice, it's always a little-jarring to see and hear him sing in these episodes. Luckily, though, "Wind" was a soft, pleasant song and the interlude is, in fairness, rather-nice. "Flower Power" has the usual, satisfying, twist-ending, wrapping things up in tidy, smile-inducing fashion. There's some unreality in that the keys to the mobile-command truck would've been left in the ignition for the hippies to drive it off to another location while Pyle was away but, on the other hand, as the Marine wasn't expecting anybody else to be present, why wouldn't he have left the keys there? A fun, near-to-the-end episode no matter how you look at it!