Hi, welcome to San Diego, and thank you for your service.
I have not tried to complete an application for a CCW in SD, mostly since I'd rather not have a 'denied' on my record.
It boils down to the "good cause" issue. Things considered "good causes" by the sheriff's dept. would be:
1. You are a high profile (read: rich celebrity) person who could be assasinated.
2. You are in a high profile job: doctor, lawyer, judge, etc.
3. You routinely carry around large amount of money or jewels.
4. You can prove that it is likely you will be assaulted by an individual, or have been assaulted by them before and they're still around.
Of course, none of these rules apply to LEOs (which is reasonable) or criminal justice employees (they leave the definition of criminal justice employee rather ambiguous).
In my experience I have known two people who have applied for CCW. First, a gentleman who has a business trading rare and gold coins, and regularly carries upward of 100k worth of such things on his person to trade shows, was turned down because he didn't carry diamonds as well. Second, a friend who was put in the hospital by her estranged husband one night, after leaving messages on her phone that he was going to kill her and their children. She couldn't "prove" that he was still a threat to her, although he was now fleeing a warrant. Apparantly the sheriff's office thought her restraining order should do it.
Even if you are a celebrity who walks around with a briefcase full of diamonds, you're still going to have to drop everything you're doing to come in for at least one interview (my gentleman friend had to go to three) scheduled by their department, between the hours of 10:00 - 3:00, M-F. You can't miss it or ask to reschedule. They MAY (this is dated information) ask you to come in for a shooting test with your weapon. My friend was given 2 hours notice, so he had to have his firearm with him at all time, drop everything at work when the notice arrived, and made it to the range 25 miles away all frazzled with minutes to spare.
Sheriff's info here:
http://www.sdsheriff.net/mgt_serv/licensing/ccw.html
They say you can call for more information, but I had not much luck with it.
Anyhow, there is an absolutely fanstastic Irish pub about 15 minutes south of Pendleton in Carlsbad if you like the sort, and I wouldn't miss the Zoo or Wild Animal Park while you're stationed here.