Strains of “Caledonia” will fill the air in Grass Valley, California, Oct. 3-4, where leading Scottish singer-songwriter Dougie MacLean is among the headliners in the 13th Annual Celtic Festival & Marketplace. Produced by and benefiting KVMR Community Radio (89.5 and 101.5FM in Tahoe/Truckee and streaming at www.kvmr.org), the festival takes place at the Nevada County Fairgrounds. [To read the entire article, click on the headline.]