funny question, but in a good way.
i had a gf that was an active nudist (we were teens and her whole family were nudists) and I went with them to both nudist "camps" and nude beaches...
i really felt ackward the first twenty minutes of the first time...after that, no worries. the places we went to had people of all ages, from toddlers to 80yr olds...lots of families...seemed like the only ones that were a little uncomfortable were a few in the 11 to 15 age range, understandable i guess, but most were totally comfortable with it.
and, i have to agree, the beaches we went to had the pervy types sometimes, but the camps never did. and NO i never saw anyone having sex, so if they were, they were pretty sly about it...i wouldnt worry about that, if anyone were obvious, they would get busted pretty quick im sure.