I guess you need 4 rods. Drift, float, one handed for "nymphing" and a two hander for swinging. I've seen a couple guys during steelhead season carry in 7 rods...all four listed above plus a plunking rod, and a couple other spinning rods for spinners and another for spoons...there is such a thing as over prepared. Now if you have a good boat, you need the obligatory 10-15 rods because two or three get snapped trying to net a 6lb hatchery brat. :P