Saying you're only looking to meet people under 50 doesn't sound very "genuine" to me. Some of the nicest people I've met on here are over 50 (yes I'm talking about you Keith).
I think you need to talk the talk before you walk the walk.
I have met many friends from this site, and TrueSwingers. Mostly it has just been for a naked coffee or a hike. Soon after I joined this site I found a couple who ran a nudist guest house in South West Portugal. Within months I went on holiday there and plunged straight into social nudity. I have made some real close friends through this site and the couple in Portugal. That includes my best (nudist) friend who I go on holiday with.
Nudists alone cuts out a huge percentage of the population. Add restrictions that some can't control cuts out another big percentage. Be open to a decent nudist buddy. He may have a circle of friends that are more specific to what you are looking for. I have met some awesome guys in their retirement years that are more active and in better shape than some thirty year olds.
Haven't had the chance to meet up with anyone from here, yet. We can't seem to make schedules mesh. Ya just keep trying.
I've met several people from other sites. A couple were okay, the others did not go well at all. One nudist couple we'd met spent the whole day trashing each other to us. Sharing much too much information for a first time meeting. They took up our whole day and we had discussed having coffee or a drink after lunch. They showed up for coffee in town and we had to almost be a little rude for them to get the hint that we'd had enough. ;DDD