Fill out FAFSA, see how much they are willing to offer you as a financial aid package. A lot of good musicians simply can't afford to go there, so you'll either need a very large college fund or a strong financial aid package.
Consider the jobs that you would want to have - session performance, producing for other musicians, engineering for other musicians, composing music for tv/film/ads, etc. You are going to want a start on whatever you are going to make your primary field of work.