Are you still looking for string musicians? I'm a classically trained violinist of almost 20 years and would love to play some chamber music! Last year was my first burn, and I found a group to play bluegrass with, but all I could think of was how great it would be to play some chamber music. Please tell me you're still looking!
Re:bringing a violin to the playa, I bought a cheap violin and bow off of craigslist explicitly for playa use that is almost newly made, with tough finishing. The violin did fine, but the carbon fiber bow broke while I was playing (not sure why exactly), so my thoughts so far are to 1) duct tape the poor thing, 2) buy another carbon fiber bow, or 3) find a very cheap wooden bow in hopes that it'll be more flexible and somehow more resilient to the heat.