Check out this thread if you haven’t already. It’ll give you an idea of what type of stats are required for CSE and CLA.:
You are correct CSE is a bit of a reach given your current stats but less so if you hit a 34. Even so, it seems that everyone is getting in with very high uw GPA’s and lots of AP’s, particularly in Math and Science. Since you wish to double major, CLA might be your best option, as you are saying. If you do college next year, just make sure your GPA doesn’t suffer. While adcoms may adjust a bit for the difficulty level in AP and PSEO, they are still for the most part looking for evidence of academic strength and perseverance. Many come into the U with some of their Liberal Ed. taken care of so if you can swing it - go for it! Do keep in mind that it can be difficult to fulfill EC’s at the high school level if you are taking a lot of college courses - Swim and/or Model UN may have to go or at the very least be cut back. As you have been active for several years in both, that won’t hurt you at all going into senior year.
Good luck to you!