The Umpqua Valley Wine, Art and Music Festival can be a grab bag of activities for enthusiasts of many stripes. The 43rd annual festival, now in its fourth year at Umpqua Community College, will stick to its title this weekend by presenting 13 winemakers, 70 artists and six musical acts. While the art changes and the wine evolves, it’s still the music that offers the greatest opportunity for each year’s festival to distinguish itself, the festival’s co-chairman, Paul Tamm, said. Tamm said organizers are thrilled to have Portland-based musicians Lloyd Jones and DK Stewart as Saturday headliners in the outdoor …