Can anyone give me an idea of the differences between the 3 places. Husband, I and kids 7 and 10 are looking to visit an area with a nice beach and great scenery. We are going to visit Disney and Legoland as well as spend a few days in San Diego. We just want to spend our free time exploring and having some good food. We are visiting in March so are aware that we won't be swimming(in the ocean), but would still like to enjoy the beach. Will probably get a hotel on the beach if possible. I imagine all of southern california is pretty informal, but if not, we are definitely quite informal and relaxed.
Any help greatly appreciated. Also open to other areas, but would like to be south of LA and north of San Diego.