<p>I don't know about the others, but UH Manoa, I'm sure you have very good chances. I spent my senior year to get residency in HI (they automatically must take you in if you are a resident and have a GPA over 3.0/very good SAT scores). I took no honors or AP classes (took a chance with that one...wasn't too motivated..."finding myself"/got with the "wrong" people...that's the long story short), but I played it easy and made a very high GPA and had good SAT scores.
I came out of the Bay Area, CA, myself (17 years there, going on one here). Since I assume you're from SoCal, the diversity is pretty much the same. Well, let me change that- there's a lot of mixed people like myself, different Asians and different Pacific Islanders. From my experience, Latinos and Black people are scarce (a very long-lasting culture shock for me at first).
Also, because of our unique place in the world/our unique age, the islands are bursting at the seams for opportunites for geography, environmental studies, and other earth sciences (don't even get me started on Astronomy!).
There's also this ability to change from so many kinds of areas...urban to rural (and during the winters where I live...to snow) in a matter of an hour or less.
Even though you say you weren't really thinking about doing it, I'd urge you to reconsider and do a little more research on us. Hah, do I sound like a commercial yet? Seriously though...it's something new.</p>