Inter UC Transfers?

<p>After applying to UCI, UCSB, and UCR, I was waitlisted for UCSB and UCR. I was rejected by UCI, but that has nothing to do with my question.</p>

<p>I was accepted to UCR. UCSB was my dream school and is near the town I used to live in.
I have until May 31st to hear if I got into UCSB, but if the worst occurs, is it possible to transfer to another UC while attending UCR? My concern is that UCR is on a lower tier than UCSB. I feel defeated about having to go to UCR and am looking for any silver lining and clinging to every ounce of hope that UCSB admissions will send me an acceptance letter or that I'll at least be able to transfer later.</p>

<p>Any information is appreciated. If anyone has experience with this kind of situation, do tell :)</p>