BillStock, a family-friendly music festival featuring over 50 musicians, most of whom are Sherwood High School alumni who performed in school’s “Rock ‘n’ Roll Revival,” takes place June 8 at Davis Airport (7200 Hawkins Creamery Rd) in Laytonsville. The event is hosten by the Sherwood Community Chamber Choir and proceeds will benefit the Olney Community Youth Choirs, which serve students in grades 4-8 regardless of school affiliation.