Lonesome Gillette:

I think there's a whole thread on re-enacting that was running recently. I do American Civil War re-enacting. It's popular all over the USA, and you can find local groups on the Internet. Yes, there is often some very wonderful music. Our unit has the Oregon Fife and Drum Corp which recreates authentic field music. Lots of folks bring guitars, banjos, fiddles and so forth and play period pieces (and there's been a thread on that too).