Oh, man my mom lives for geocaching. I don't think she is part of a club either but, she has gone to some picinics and other things where a bunch of cachers meat up. When she goes on vacation, her vacation is finding caches somewhere else. Over christmas I was staying at her house, and it was 11 at night, she got a email saying there was a new cahce couple miles from her house. We ended up going out there at 11:30 to try and be the first ones to find it, there is some guy that lives close to her that is always the first one to find all of them, he has like 90 first finds, Well on are way into this one we passed him on his way out.
I have gone a few times on my own and actually found my first cache without even knowing it was supposed to be there, was just out in the woods and stumble upon the cache.