Watch the Forbidden Village online guitar lesson by Jason Loughlin from Essentials: Surf Guitar
Harmonically, Martin Denny had a very unique style. There's a lot of chromatic movement in the chords and a lot of added color by using major 7ths, b5ths, 6ths, and augmented chords.
This study is in E and has two sections: The first is over a I-V-I-IV-I-V-I progression. Seems simple, but by adding 6th/9ths to the major chords, altering each dom 7th chord, and chromatically moving chords to follow the melody, it quickly becomes complex, lush, and beautiful. The second section has the chromaticism built into the progression. We're moving major chords up and down half steps and finding a melody to connect them. All this is done over a slower Mozambique rhythm.