Maybe the fishing below Norfork dam is different, but yesterday I just tied on a black woolybugger and went to fishing. Caught at least 50 fish on the same black bugger from a stretch no more than 50 yards. But then, the Norfork is loaded with stockers. Maybe if I had been somewhere like the Madison, Bighorn, Frying Pan, Yellwostone etc, it might be different. Same goes for Crooked Creek. Tie on a bugger, Clouser or Gurgeler, wade in and start catching fish.
I always pay attention to what's going on in the water when I'm fishing, and notice the water as soon as I arrive, but I don't wait an hour looking for bugs to come off. I guess if the fish aren't biting what I'm offering, then I'll slow down and try to figure out what's going on, but I don't run into that very often. Usually when the water is stained from rain or snowmelt, or the water is cold.
But then, if you want to sit on the bank and watch me catch fish while you try to figure out what's gonna work for you...