Many years ago, I worked at Olde Port Fish Co out on Port San Luis pier. On the road into Port San Luis, there is a small and very calm beach that is protected from surf. No surf launch. Don't remember how difficult it would be to get your kayak down to the beach but there should be some access. Yes, the halibut fishing there should be quite good. There is a bait on tackle shop for frozen bait, but I don't remember ever being able to buy live bait. You may have to catch it, but frozen should work fine. Have fun. It is beautiful country and I miss it very much.
Janine