This week’s episode of Mountain Stage features a pickers paradise, as we’re treated to sets from J2B2, the John Jorgenson Bluegrass Band, plus the GRAMMY-nominated bluegrass group Della Mae, 2019 IBMA Momentum Instrumentalist of the Year Tray Wellington and his band, plus a duo set from Kieran Kane & Rayna Gellert, and topical singer-songwriter Crys Matthews.