Carry on Camping (1969)

Sid and Bernie keep having their amorous intentions snubbed by their girlfriends Joan and Anthea. The boys suggest a camping holiday, secretly intending to take them to a nudist camp. Of course they end up in the wrong place, and meet up with the weirdest bunch of campers you can imagine! Coach loads of sex-starved schoolgirls and bands of hippies all add to the laughs.—Simon N. McIntosh-Smith