Surprise a guy would have the guts to approach them. o_o
Honesty don't think you would get a lot of people coming to this kind area considering the size.
Hippie side talking, but why did the guy need to confront the girls and correct their "manners"? He could have just minded his own business.
Nudists on a mountain trail seems to be the equivalent of using your phone during a movie. It can be a bother to someone who just came to see the mountain.
The artist Nihon Dandy did do A yuri exhibition manga called [Nihon Dandy (Matsuno Susumu)] Talent Model no Razoku Taikenki, beware dicks! No sex though, yuri or otherwise.
It's funny that I'm surprised at finding adult men in a Japanese manga that are actually acting in a responsible way instead of like complete perverts.