I've only seen one sets of chords out here on the internet but they didn't sound quite 
right so I studied Dallas Green play it live and acoustic and made my own version which I 
believe is correct.

Capo on the 4th fret. Standard tuning.

CHORDS
  Am7     C/G     Em    Dsus2/F#    Em7    Em7* (don't know the actual name)
e--0------0------0-------0----------0------0------------|
B--1------1------0-------3----------0------0------------|
G--0------0------0-------2----------0------0------------|
D--2------2------2-------0----------0------0------------|
A--0------3------2-------0----------2------4------------|
E---------3------0-------2----------0------0------------|

Intro (relative to the capo)

  2x (strumming instead of picking)     1x (listen for the strumming)
e--------------------------------|-0--0---0---0----0----0----0----0---0--|
B--------------------------------|-0--0---0---0----0----0----0----0---0--|
G--0-0--0----0------0h2----2h4---|-0--0---0--0h2--2p0--0h2--2h4--4p2--2p0|
D--0-2--2h4--4h5----5------5-----|-2--2p0-0---0----0----0----0----0---0--|
A--0-0--0----0------0------0-----|-3--3---3---3----3----3----3----3---3--|
E--------------------------------|-0--0---0---0----0----0----0----0---0--|
The whole intro part is played twice.

When playing Am7 he does pulloffs and hammer ons with his 1st finger on the B string and 
also hammers on with his pinky on the high e string on the 3rd
fret. When playing C with the G base he first does a pull off and a hammer on
 with on the B string, then with the 2nd finger on the D string and after
that a pull off with his 4th finger on A string but if you do this you must move your 
second finger to the A string which makes a new chord which I can't name for the life of 
me. Play around with these, he
does them different every time.

Verse

Am7
Northwest is where I'm headed,
                      C/G
Underneath the golden sky
     Am7
I'm searching for a wisdom
                        C/G
That every man seeks to find
         Am7
I've got wicked thoughts a brewin'
                      C/G
Many evil deeds I've done
     Am7
I'm looking for a reason
                    C/G
For a reason not to run

Chorus (notice the Em7 isn't a regular one)

     Em
I've always been dark
     Dsus/2F#            Em7 -> Em7*(slide)
With light somewhere in the distance

Verse
     Am7
I've got no destination
                    C/G
No place to call my own
         Am7
I'll explore the constellations
                                 C/G
Till I find the course I mean to hone
          Am7
But come fever or come famine
                       C/G
Come the biting winter cold
             Am7
Just put two coins upon my eyelids
                            C/G
So I can pay the poor man's toll

Chorus

     Em
I've always been dark
     Dsus/2F#            Em7 -> Em7*(slide)
With light somewhere in the distance

      Em
I've been so unforgiving
   Dsus/2F#            Em7 -> Em7*(slide)
Stranded in old traditions
     Em
I've always been dark
     Dsus/2F#            Em7 -> Em7*(slide)
With light somewhere in the distance

Bridge

Played twice
Dsus2/F#  Em   CG

     Em
I've always been dark
     Dsus/2F#            Em7 -> Em7*(slide)
With light somewhere in the distance