July 5th? Don't (ley anyone know you are going to) bring fireworks, and don't expect to buy anything cool here. Pretty much if it sparkles or gives off smoke it's ok; if it explodes, shoots, flies, etc then you won't be able to find it here without 'special' help. So if you like that sort of thing, then come after the 4th (like you are planning).
Sea World is cool, but for guys it doesn't seem to hold their appeal like it does with women. Still, gets you the MAD points with whatever girl you bring (wife, daughter, friend, boss, etc). Disneyland is also a great place to go, but it sounds like you aren't too interested in going there. Six Flags is for big boys and if you like rollercoasters it would be a sin to come here and not go there. If you are going to Sea World you could also hit the San Diego Zoo while you're at it. It's only the world's biggest and best, so why not.
Fishing is one of those things I have wanted to get into for a long time but haven't yet. Wish I could help, but I can't. Sorry.
In my opinion, California doesn't seem to do the nice resturaunt thing well. Don't get me wrong, there are VERY nice places but more or less it will be a chain or a second rate nice place like Olive Garden. Because of that I would suggest getting tips for local places from people in your area. If you like Japanese grill stuff, there is a place called Kobe in the Palm Springs area. It's kind of pricey but nice, plus you get the traditional Japanese grill entertainment.
Outside of fishing, what else are you interested in doing? Obviously we have some nice beaches if you like that sort of thing, shopping for any lady friends that are coming, the Hollywood sites (just know where you are going). There's plenty of stuff to do, and if you give us an idea of what you're interested in we can better guide you.
PS. There are a lot of us here, and without full firearm rights most of us only have drinking to do for a past time/money sink. You sure you want to offer free drinks?