Last time I was in Sun Valley I took a lesson with Ralph Harris, who I believe that the time was a Rocky Mountain Examiner. Best lesson I've ever had. And a truly wonderful person, the kind you don't forget. I don't know if he does groups, or if he's still actively instructing, as this was about three years ago, but it would be worth your while to ask. I know I'm going to look him up the next time I'm out there.