Keyboardist Steve Molitz (Particle) and guitarist Chris Michetti (RAQ) will sit in with the Underground Orchestra at this month’s Joshua Tree Music Festival. As previously reported, the event will take place in Californias Joshua Tree National Park from May 15-17, featuring Kraak & Smaak (live band), Ganga Giri, Boombox, Porter Batiste Stoltz, Gandalf Murphy & the Slambovian Circus of Dreams, Rupa & the April Fishes, Extra Golden and many others. Underground Orchestras guest-heavy set is scheduled for 4:20 PM, May 17. The Underground Orchestra is also slated to appear at festivals like Rothbury and Wakarusa later this summer.