Re: Wolly Buggers?
Ditto to what everyone else said. A couple of sizes (say, 6 and 10 or 8 and 12) and a couple of colors (black and a lighter drab color like olive, rust, or brown) should do it. For more variety, carry some with beadheads and some unweighted.
Fish them any of the many ways you would fish a streamer or nymph. One tactic that nobody has mentioned yet, but works well for me, is to fish them down and across on a wet-fly swing with a sink-tip line. Tom Rosenbauer thinks they imitate small crayfish on the bottom.