Russ: Tell Charlie Poole and the string band banjo players that there are basically two ways to play a five string... bluegrass and clawhammer. I've been playing banjo for forty years, and I don't play bluegrass and only do a few songs in clawhammer style. If by "bluegrass" you mean finger-picked, then you're right. I think of bluegrass banjo as a very particular style of fingerpicking. The old southern mountain bnajo players were much more idioscyncratic.
Jerry