fox, I've never got the bug myself, but have a few buddies (both spin and fly) who got seriously into chasing big browns in small streams.
You gotta figure out what, and when, they are eating. That's what tells you where they are.
Generally the when is at night. These guys chase them at night. Yeah, they'll go in with a rod in hand and throw a few casts before turning the light on. But don't leave without doing so! Usually they have a failed trip or two before figuring it out. Typically they'll turn the light on and find the fish in an unexpected spot, like a shallow tail out, or in the riffle above. Then come in a few nights later and target that spot.
About the only time they fish during the day is in high muddy conditions, as these mostly nocturnal fish will get active in brown water.
I was one of their "informers". If I fished a small stream and came across a pool that was strangely absent of all life, including minnows and smaller trout, they wanted to know about it. Especially if there was an overhang. And I'd often get a cell phone pic a few days or weeks later with a monster pulled out of there, or at least a nighttime photo of big fish visible by flashlight in a tailout or something.
I would not be surprised in the least if these fish in different spots that you are seeing are actually different fish. It's pretty common that in holes like these you find a pod of 3, 4, or 5 fish like that. During the day, when not feeding, they'll try to be tucked up under a ledge or something. But there can be competition for holding spots in lower water, and the fish you are seeing might actually be the non-dominant ones kicked out of the prime lies!!! Or, if it is in the fall, they could be spawning on the shallows as well, or looking to. It's not impossible, but unless you see them actually do so I have my doubts if they are feeding out there in clear water during the day.
That's all assuming their resident fish, and not coming up from bigger water below, though. If they are travelling fish, well, yeah, they'll move a lot. There are plenty of steelhead books that describe where fish will hold in different "moods" during travel. It fits for river/lake run fish outside the great lakes, too.