Revealing mistake: Although the movie 'Carry On Camping' is supposed to have been set in the summer time, it was actually filmed in November 1968, during a spell of very cold weather. You can actually see the cast's breath in the cold air at some points. The field in which the famous "flying bra" sequence was shot was so muddy, that the mud had to be sprayed green to make it look like grass.
Trivia: As mentioned in the 'mistakes' section, Barbara Windor's bra was snatched from her with the aid of a fishing line. What is not so widely known, however, is the shot that made it into "Carry On Camping" was, in fact the second take of that shot. On the first take of getting Ms. Windsor's bra to fly though the air, the bra did NOT come off - Barbara Windsor was pulled and landed face down in the mud.