What Saba_Slayer said.
I seem to remember it's 14 miles from Cabrillo ramp to the Dominator. From King Harbor to Dominator is about 4.5 miles.
I did a beach launch out of RAT Beach for the first time last Spring looking for wsb. It was a lot of work hauling the yak back up the hill, but I intend to do it again next year. You have to pick a small surf day. I didn't, and it made for an interesting landing.