I agree. Assuming we were in the same place, the two otters I saw were big enough that when they started swimming around me I actually got out of the water to let them have room. They seemed a little perturbed that I was in their way. When they passed I got back in and kept fishing.
I was there two weeks ago on Friday evening and the hatch(s) were spectacular. There were March Browns, Yellow Sallies, and Light Cahill coming off at the same time. The trout were eating them up, but still had a hard time getting them to take any of my yellow flies. I tried a Light Cahill and that did the trick. It was a great evening for fishing.