Considering you’re in-state, I think you should apply EA. Although you’re not a “shoe-in,” the worst that could possibly happen is you get deferred. I am not an admissions officer, but I highly doubt you would get denied EA since you have a pretty good GPA, SAT score, and course load. I would definitely take SAT subject tests (in October) to help boost your application. Have you considered taking the ACT? There’s a test in September and October, and admissions will take your best score. Best of luck!