It’s certainly been quite the revolving door over in the Doobie Brothers camp over the past 40 years. Live At Wolf Trap, the group’s DVD recorded in 2004 at Virginia’s famous outdoor concert shed Wolf Trap, features original Doobies Tom Johnston, Pat Simmons, longtime guitarist John McFee, a grouping of blisteringly perfect horn players, and the last footage of drummer Keith Knudsen. We get 23 tunes running throughout the band’s history.