The Easiest Way To immitate Seasick Steves '3 String Trance Wonder' is by tuning the 
'E' up to 'G' and tuning the 'A' down to a 'G' and putting your guitar to the neck pickup

e (not used)
B (same)
G (same)
D (not used)
A (down to) G
E (up to) G

Intro

e|----------------------------------------------|
B|-----------/6-------------/5--------------/4--|
G|----------------------------------------------|  x4
D|----------------------------------------------|
A|----------------------------------------------|
E|----------------------|

e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|  x4
D|-------------------------------------------|
A|-------------------------------------------|
E|-0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0--|

"Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|


           Verse 2
e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|  x4
D|-------------------------------------------|
A|-------------------------------------------|
E|-0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0--|


       "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|

       "Awhoooo!"
e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|  x3
D|-------------------------------------------|
A|-------------------------------------------|
E|-0--0-0--0-0--0-0--0--5--5--3-3--0-0-3/5-0-|

      "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|

           "Doghouse, Doghouse"
e|-------------------------------------------|
B|--/12-12-----------------------------------|
G|--/12-12-----------------------------------| x3
D|-------------------------------------------|
A|-------------------------------------------|
E|--------3b-0--3b-0--3b-0--0--0-0-----------|

        "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|

Long Verse
e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|  x16
D|-------------------------------------------|
A|-------------------------------------------|
E|-0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0--|

 "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|


         "Awhoooo!"
e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|  x3
D|-------------------------------------------|
A|-------------------------------------------|
E|-0--0-0--0-0--0-0--0--5--5--3-3--0-0-3/5-0-|


         "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|

           "Doghouse, Doghouse"
e|-------------------------------------------|
B|--/12-12-----------------------------------|
G|--/12-12-----------------------------------| x3
D|-------------------------------------------|
A|-------------------------------------------|
E|--------3b-0--3b-0--3b-0--0--0-0-----------|


         "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------| x2
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|

         "Sing the doghouse song"
e|-------------------------------------|
B|-----------------------/12--12-12-12-|
G|-----------------------/12--12-12-12-| x2
D|-------------------------------------|
A|-------------------------------------|
E|-/5--5--/3--3--0--0-0----------------|


         "Sing the doghouse song"
e|------------------------------------------------------|
B|------------------------------------------------------|
G|------------------------------------------------------|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|-/5-5-/3-3---0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0-|


          Verse, but up the tempo
e|-------------------------------------------|
B|-------------------------------------------|
G|-------------------------------------------|  x4
D|-------------------------------------------|
A|-------------------------------------------|
E|-0--0-0--0-0--0-0--0-0--0-0--0-0--0-3/5-0--|

         "Sing the doghouse song"
e|-------------------------------------|
B|-----------------------/12--12-12-12-|
G|-----------------------/12--12-12-12-| x4
D|-------------------------------------|
A|-------------------------------------|
E|-/5--5--/3--3--0--0-0----------------|

         "Sing the doghouse ..."
e|---------------------------------------------|
B|---------------------------------------------|
G|-----------------/12-12-12-12-12-12-12-12-12-|
D|-----------------/12-12-12-12-12-12-12-12-12-|
A|-----------------/12-12-12-12-12-12-12-12-12-|
E|-5--5--3~~~~~~-------------------------------|

credit goes to samyboySCO i just adapted it to the tuning seasick steve uses