Thanks for these additional suggestions! Gettysburg would be very easy for us to visit so maybe I’ll add it to the tentative list.
He hasn’t actually discussed any of this with his private teacher yet so that would be a good place to start (especially so he can choose and work on additional audition pieces).
I think he may be looking for a place where he could also take classes in music technology or audio production as well, which I know is harder to find. I need to pick the boy’s brain a little more but he seems to have constant jazz band practice this week!