Gumtree canoe - and if you can learn the "soft shoe shuffle" you'll go down a storm! (John Hartford)

You may want to try Wabash cannonball, i like to put solos in between verses.

Oh yes - my favourite banjo/vocal is "Ruthie" (Wernick)

You can get away with DB's as well; picking the a, part at the bridge and the b, part at the base of the neck.

Good luck.