On the Bus with Bill MonroeA backstage audition led Mark Hembree into a five year stint (19791984) as the bassist for Bill Monroe's Blue Grass Boys. Hembrees journey included playing at the White House and on the acclaimed album Master of Bluegrass. But it also put him on a collision course with the rigors of touring, the mysteries of Southern culture, and the complex personality of bandleader legend Bill Monroe. Whether its figuring out the best time for breakfast (early) or