The Rocky Mountain Fiddle Camp, which debuted last year and was a rousing success, is back this year with added vigor, not to mention an all-star faculty headed up by Scottish fiddle whiz Iain Fraser. But this year's weeklong fête in the mountains will be far more than a bunch of fiddlers fiddling around; expanded to include numerous other instruments, such as harp, piano, mandolin and guitar, the camp is mostly about making good music, and there's plenty of time for that. The music's nonstop, from the time you get up for classes to the time you go to bed, worn out by an evening of jamming and dancing. When the music stops, it's to make room for hiking or fishing or some old-fashioned campfire storytelling. This is non-violins at its best.