You have covered many things I would recommend. If you decide on San Diego Zoo - they have a park outside of San Diego called Safari Park - it is also wonderful. You can get passes that enable you to go to both that and the zoo in downtown San Diego.

If you are coming to Dana Point you should also see Mission San Juan Capistrano. In addition to be an incredibly beautiful place - it is about the history of California. San Juan Capistrano is on one side of Dana Point. Onthe north side of Dana Point is Laguna Beach. One of my favorite places to take visitors is the public beach that runs in front of the Montage Resort which is on Pacific Coast Highway. The scenery is incredible.

You might also consider taking the boat to Catalina Island. It is a fun ride and the island is interesting. Boats run from San Pedro and Dana Point.