I dont know what its like in america but I went to a gathering this year in tasmania, Australia and it was sick. Having said that I am quite open to spirituality so a lot of what happened didnt phase me much.
I was worried before I went that everyone would be these fake ass hippie positive-obsessed people but was happy to meet lots of different people who all just wanted to escape the daily grind and norms of society. It was just this super relaxing time in a beautiful natural location.
Its definitly not for everyone, but if you dont drink much, love to meet new people and have an open mind and love being outside naked and free in nature then its probably worth a shot to see what you think. Having said that this was in tassie and there was only 100 people so I have no idea what the vibe is like at the gatherings in the usa.