There's the Bayou Brass (they're a quintet that play trumpets, sax, other brass, plus a drummer/percussionist). Also there's the Delta Daddy-O's--an accapella quartet. Both perform in New Orleans Square and are generally non-published (the only time I've seen them listed was on July 17th). Also, there's Farley the Fiddler who plays in Frontierland, usually in front of Pioneer Mercantile.