It's a little late notice on the Strawberry Fest but worth putting the word out anyway for this 4 days fest. May 23-27. It's up near Yosemite. Camping and 4 days of music with other activities like yoga, nature walks, a lake to swim in. Music ranges from folk to bluegrass, celtic, swing, rock, gospel...
Facebook site has a lot of information: https://www.facebook.com/StrawberryMusicFestival
as well as the website: http://www.strawberrymusic.com/Festival_Entering_The_Festival.aspx
Meeting there is a little challenging due to no cell phone service and camping sites are wherever you choose when you get there. I will hang a red sheet by my van with a homemade meetup sign attached and also post on the message board at the camp where I'm camping.
I'm signed up to meet another meetup group as well but wanted to expand the group since it's the type of thing that is the more the merrier and people wander around a lot at this type of event. The other group is the Calif. Camping Music Festivals Meetup. http://www.meetup.com/California-Camping-Music-Festivals/events/98396152/ . They will hang a banner "Dead Sea Sh'mores".
Kate Wolf fest is more folk music and it is in Laytonville the last weekend of Sept. More details on that to follow.