I try to maintain a certain amount of anonymity on the forum, but I'll just be giving myself away with this one, so I might as well reveal it, haha. I am a UCSB doctoral student in the combined Counseling, Clinical, & School Psychology program, and it seems like a great match for your interests. Since you're looking to be a school psychologist with competencies in clinical psychology, this program is excellent as the combined cohort moves through core classes together, in addition to individuals taking classes specific to their emphasis area (either counseling, clinical, or school psychology). For school psych students- in your first year, you would complete a basic practicum with all students learning basic counseling skills (which would serve you well as you consider pursuing a balance between school psychology and clinical psychology), and in your second year, you would begin your advanced practicum at a local K-12 school. School psychology students also have the opportunity to complete an additional advanced practicum at the Hosford Clinic, the student training clinic that counseling and clinical students train at for advanced practicum when the school psychology students begin their practicum at schools. So, you would have the opportunity to preform both school psychology practicum in school settings, and psychotherapy in a clinical population and setting.
The faculty in the School Psych emphasis of the Counseling, Clinical, & School Psychology Ph.D. program at UC Santa Barbara are very prolific, research-wise and in regards to community outreach and engagement. The program is pretty competitive, with an overall 8% acceptance rate, and 1.3% acceptance rate for the school psychology emphasis specifically. The data isn't available yet, but for our current internship year 2015 - 2016 the program had a 100% APA match rate. The prior three years are 92.9%, 90.1%, and 83.3%, respectively.
For the sake of transparency, for some reason, the university does not guarantee funding. I truly don't know, and can't understand, why it doesn't. Other schools I applied to made it clear that all students would receive tuition remission, plus ~17,000 - 22,000 dollars in funding. UCSB told me it would provide a first-year block grant, and two students per cohort receive four years of tuition remission plus an $18,000 stipend (this is in addition to any GSR or GTA positions you would receive). In my experience, funding has not been difficult to obtain. I received a teaching assistantship every quarter of my first-year, and my tuition was covered by the block grant (so the tuition remission I received from the TAship was a nice little bonus check), I am a teaching assistant this summer, and I have a teaching assistantship with an $18,000 stipend and full tuition remission for 2016 - 2017. Anyway, you have to obtain your own funding on a year by year basis (either through teaching, finding faculty with grants and becoming a GSR, or other student assistant positions) which would turn some people off, but this university was my top choice and after speaking to students on interview day, I was confident that the funding wouldn't be an issue. On the plus side, a lot of the school psych faculty are well-funded through program evaluation work, and a lot of school psych students receive GSRs.
Another option you may consider is UC Riverside's School Psychology program. I can't offer as much information since I'm not a student there, but I do know that the faculty I was in contact with had Ph.D. in School Psychology, but did her clinical internship providing psychotherapy (CBT) to children, and her research was on depression after peer victimization, so she was school psych with that clinical bent to it. I know UCR is fully-funded, guaranteed. The professor's name was Dr. Cixin Wang- she is extremely nice.
I hope this was helpful! Good luck!
