I played it last year on baritone with the Grand Street Community Band in Brooklyn. NY. I found a great resource to be this video of Fennell rehearsing the navy band. I watched to whole thing and marked my part as he went. Also, check if your band owns the critical edition score and parts. If not, I own the set and can lend it to you.
https://youtu.be/9mNMCX93jGA
Don