wbranch- yes, I never targeted them as I was fishing for salmon or cutthroat.
The first one I caught was a very hot summer day in August up in the National Forest in a tributary of the Bitteroot on a big stimulator. I was very suprised I catch it. It was one of my favorite fly fishing days. In addition; it was the same day as catching my first Westslope Cutthroat. Such a great day, fond memory. I think I ate a steak that night.
Most of the Bulls came on a salmon trip on the Olympic Peninsula, which was a surprise to me. The guide really didn’t mention how prevalent they were in the system we were fishing. If anyone wants a great experience the OP is awesome.