The congregational part is in unison.  The arrangement uses a couple of different reharmonizations.  This could work as a vocal solo with orchestra or even as an orchestra feature.  Parts include organ w/pedals (piano), drum set (snare, bass, and cymbals), tympani, chimes, bells, marimba, flute (clarinet), the brass quintet – 2 trumpets, horn, trombone, Tuba with subs for alto sax, tenor sax, trombone/euphonium, baritone sax; full strings 2111.  Celebrating theme with reharmonization on stanzas 3 & 4