My take on it is this: Judging by friends and students in California, the San Diego area is at least much more likely to grant you a permit than the L.A. area or the Bay Area, but much less likely to issue the permit than Sacramento County or some parts of more northerly California.
I would recommend that you post your question on the CalGuns forum, and contact the CalGuns foundation. (Despite the similar names, they are not the same entitites, but both are something you'll want to belong to if you're going to live there.)
I would also be remiss if I didn't suggest that you remind you that there are "shall issue" states that have pretty cool beaches...
Wishing you the best,