Hey Kiet-
In case you didn't find the sticky, here's a direct link:
http://www.scubaboard.com/showthread.php?t=85342
In a nutshell, here's the deal:
1. Get off the boat, you'll be near some blue (or is it gray?) buildings. One of them is for a gear truck. Pay them like $8 and you get round trip service to and from the park. Have a cell phone to call them for the return. It's some of the best money you'll have ever spent. I've made the walk with gear. It's do-able, but not fun.
2. They ask when you'll be at the park. You walk over to Casino Point, and your stuff should be waiting for you.
3. You find a place near where they left your gear, preferably not right on top of someone. You'll see other divers there already, so it should be obvious how the lineup works. My favorite places are on the wall closest to the water, or near the wall of the casino.
4. Hit the stairs, have a fun dive. When you come back up, head over to the fill station. You can run a tab all day if you give them your C-card (if I remember correctly). Otherwise, it's like $6 a fill when you pick up the tank. Go eat something, or have fun snorkeling. Come back, get your tank. Don't forget sun block.
5. Go dive. Tell everyone you found the Jacques Cousteau plaque, even though you didn't. You'll look cooler to all the girls.
6. Come back up, start all over again.
There are lockers for valuables, although I think most people forgo them. I've been there maybe 6 times now and have not had a problem, and I have never heard from anyone who has. That said, don't leave your wallet in plain sight, but you're probably cool to tuck it away in the deep corner of your dive bag.
Have fun! Casino Point really is a soCal treasure.