Hmm. I get almost all of the ideas you have there, and would participate in most, swimming, massage and sunning... I am not sure i would go hiking though.. Well, I would not go hiking clothed, but nude hiking seems like even less fun to me.

That said. I think most of the au naturale activities are confined to resort environments. Some years back (maybe 2005 or so) Hedonisim had a mass, nude wedding. The resort actually had protestors, and the event was not even open to the public. I always see nude boaters though whenever I rent a jet ski or go out in a kayak.