With cooler temps and low water, expect to see fewer dry fly opportunities and more nymphing and streamer options. Still some Oct Caddis floating around and the occasional BWO hatch may be available during the warmer parts of the day. San Juan Worms, Princes, PT's and Stonefly Nymphs will be your best shot at keeping your rod bent. An olive or white streamer is a good place to start for the folks wanting to throw big junk.
Flows: @ Bonner = 386 CFS (Steady)