Another option is to work on your college apps now and be prepared for band camp.
Read this:
http://talk.collegeconfidential.com/high-school-life/1905009-rising-seniors-what-to-do-this-summer-and-you-will-be-glad-you-did-come-fall.html#latest
Also, why are you taking AP music theory? Are you interested in music? Are you going to continue music in college?
Seems like if you quit band, what is the point of AP Music theory? You are or are not interested in music.
Like everyone says,it isn’t “s/he with the most APs wins”…make sure you can do well in the APs even if you need to take less of them.
Are you planning to be a STEM major? Otherwise, why take more Physics APs?