It doesn't matter. Go where you are comfortable.
Some food for thought though..
Chico is party central. If you are the studious kind of kid, then this could be to your advantage... especially in classes that are curved. Find a few good friends who aren't into distractions... while others will be out partying, you will be studying and setting the curve!
If you like Sonoma and feel you will do well there, then go there.
I recommend going the CC route, taking your pre-reqss there and acing them... and then transferring to a CSU or UC of your choice to finish your upper divs.
GPA and MCAT are the things that matter. Doesn't matter where you go.