Look into St Olaf, excellent math and music even for non majors (music scholarship competition open to all, deadline would be Nov-Dec sr year). If you show interest starting now it’d be a likely/safety - join the mailing list, open the emails and click on the links that look interesting. 1/3 students are high level musicians so you’re surrounded by all sorts of music and music opportunities.
Do run the NPC (they offer merit as well as need based aid)
U Vermont and Chapman would be academic safeties.
Wouldn’t Cal Polys be better than Chapman for math though?
Most of your list are reaches due to selectivity - you’re within range but they’re too unpredictable.
UC Davis, Santa Cruz.. should be okay as targets or likelies for Math as long as your grades remain that high.
Since you’re considering Pitt, I’ll throw a word in for Penn State for Math+Schreyer 
(top Honors college, greater depth in all sorts of maths).
BTW don’t forget Honors Colleges at your various universities. UMich LSA is another top Honors College. Offerings and perks vary so worth investigating.