I've been fishing the North Fork of the Lewis for nearly 20 years. There are no special rules that I know of. This is a sledding river for the most part and there are relatively fewer drift boats than on some rivers. Most of us sledders try to yield to the drift boats since they can't run back and hammer a drift over and over like we can. It is easy water and a great place to fish. This year apparently we are able to keep fall chinook, and that is a first for the last several years.