On notating Swing rhythms

Nov 25, 2019

I am currently polishing up an arrangement for Glorious Morning for marching band when I hit a road block. You see, The entire piece is in a triplet swing, and whenever I have encountered this in marching band I always saw it as notated how to swing the notation right next to the tempo, but the piece has the first note both held and not in some places, so how should I go about notating this? Should I stick to 4/4, and just choose one to write as a triplet, and if so, what, or should I write it in 12/8 and leave a note saying "Conduct in 4?"