I’m currently on a camping in Croatia, it’s so hot even swimming trousers feel sticky and irritating. It would be more comfortable just to be nude.
FKK still seems to be booming here, I noticed huge campings, 2000 or more spots, lots of facilities, all FKK.
Also spend many holidays as a kid on an FKK camping in Yugoslavia, wasn’t always easy, especially as a adolescent (always bring a towel), but it always felt like a normal family camping.