My hook size varies with river conditions. When the water is high and less that clear, I use a larger offering. In this case I like 1/0 or 2/0 hooks. When rivers are low and clear I use a 1 or 2 and size down offerings. I do seem to have a somewhat better bite to hook ratio when using the larger hooks. When a fish hits downstream from me and I'm using the smaller hooks I do have a tendency to pull them away more often.