My wife and I saw this movie last night at the Mammoth Community Center, in the Park. I believe they said that was the 4th showing of the film, with 17 more showings across the country in the next 30 days. You can also buy the DVD online.
I thought the film was good, and worth seeing, but it seemed to lack a bit of focus as to what it's real objective was - was it fly fishing, conservation, or of the people and places seen along the 300 or so miles of river that they floated in just 30 days.
It did renew my appreciation of what a wonderful treasure the Yellowstone River is, however, and how lucky I am to be able to spend practically every day on it for nearly 5 months every year.