What Patrick Costello says!

What is missing are basic song accompaniments in tab form using the Seeger style of playing which is principally up picking. His accompaniments are basic and effective for singing.
He employs double-thumbing, some three-finger style for fills. He applies the "whamming" technique for louder parts of a song and to lead an audience.

Simple is always best because the sound of the banjo really supports the voice well and you don't have to play a lot of notes.