Originally Posted by diamond rush
On very small streams, you're often limited to only using the upstream method, except on a few large pools. I imagine that it depends on the fish and what they're feeding on. In his introductory chapters, Brooks tells of the need to determine what the fish are feeding on and match the behavior of the naturals. So it is different from stream to stream and even hole to hole sometimes.
Brooks talks a lot about matching the 'hatch'. However the book is mainly about presentation. Rosenbauer and Humphrey are deeply into presentation.
If you look at all three they seem to use about a dozen patterns each for all their nymphing. (skiinny mayflies, fat mayflies, stoneflies, caddis pupa and larvae, midges
You're right about the small stream thing and upstream casting.