John:

Every prominent angler in the area I have spoken to or otherwise heard from is opposed to this (Craig Mathews, Bud Lilly, Bob Jacklin, John Bailey, and Richard Parks among them) and the park's chief of resources admitted to me that they hadn't thoroughly thought through the effects of the regulations on rivers like the Gardner and Gallatin, which have long had thoroughly mixed populations of fish and no clear way of keeping non-natives out (the whole lower Gardner is only about 10 miles long and there are no fish barriers below this) rather than rivers like Slough Creek, with a preponderance of cutthroats that face threats that have developed recently and areas where fish barriers can be constructed.