The one we used to drift a lot when I was growing up was the Deschutes river in central Oregon. It is very popular now with white water drifters and fly fisherman, but when we used to drift and fish it in the 60's and early 70's we never saw another soul. And the fishing was unbelievable. That river is so full of may flys, caddis, stone fly nymphs, and crawdads that it is no wonder that is produces some of the most beautiful red side rainbow trout in the world. And it also is a superb Steelhead stream.