It was the Dizzy Gillespie Group at Onkel Po’s that I was wondering about, not with Hayes.
That T.S. Monk Group, as I recall it, had Don Sickler on trumpet and I think Bobby Poricelli on saxes. Not sure who was on bass. They played quite a few of the Sickler arrangements which are on the TS Monk Blue Notes, including some of Thelonius’s tunes of course but also gems by Kenny
Edited to say that the bassist, I think, was Scott Colley. Next time I saw him was in the UK with Jim Hall ! Can’t recall if Willie Williams was also in the band on tenor but he might have been.