Most of Stan's songs recorded during his lifetime are in the excellent songbook put out by OFC publications: heres on on-line source. Songs from Fogartys CoveThis book is an excellent intro to dadgad tuning which Stan used to great effect. Don't know if it has chords for Northwest Passage which of course was recorded in 3-part a capella. But I've found, since Stan's own versions of his songs tend to be "definitive versions" in order not to sound like a poor imitation, I like playing NW Passage as a DADGAD finger-picking ballad. The chords are fairly straightforward--if you need 'em, pick a key and i'll try to construct them for you.
Welcome! Bill