After playing just the melody notes through once, I like to play this a second time with twice as many strokes... it fills the song out somehow.
See below for an MP3 of this arrangement.
Note that this is in 3/4 time, with the first beat of each line held over from the previous measure.
Chords: G G - (C) - G C G C - (G) D G -
Melody: D4 D E D B C D C B A B G3
Lyrics: We ga - ther together in joy -ful Thanksgiving,