Hackler, You can check at local fly shops in Missoula for information. You might PM johnscott on this site and ask if he's up for a fish. He lives in the Missoula area and knows it well. I think there may be a few more FAOLers in that area if you can't find John.
You missed the Idaho fish-in by a few days. Jack Hise might still be in that area too. Jim