M.D.
I live in South County so don't have specific suggestions for you, but what's wrong with pre-schools that also have day care? My sons go to a school like this and it's wonderful. School is specified times of the day and outside of that activities are different during daycare times. I wouldn't limit yourself from schools with daycares...it's just a practical thing that most of us need with the need to have both parents bringing in incomes these days.
Good luck.
-M