Planning ahead, I have booked the entire 11-person trip for a 5-night descent of the Selway River, a 47-mile outing that starts in southeastern Montana. We will travel with Hughes Expeditions, who have impressed us with the quality of their service on the Middle Fork of the Salmon, for example on our 2016 trip . Per Hughes' writeup, "The Selway River Trip is a premier mountain wilderness, whitewater, camping, and fly fishing trip that flows through beautiful forested canyons.