Solos are in the bass, guitar (electric), and trombone 2. It is important to have strong players in all of these positions.
5 reeds (no doubles), 4 trumpets (harmons), 3 trombones (harmon in lead), 1 bass trombone (bucket), accordion, guitar (electronics/pedals for effects), piano, bass, drums. If you don’t have accordion, this piece is still possible to play. Vibes could be interesting as a replacement to add a little more fortification to the rhythm section if you don’t have accordion available.