I would avoid anything around the Palm Springs area during spring break unless you know specifically that the property you are staying at is immune to and isolated from the spring break chaos that pervades this area.

San Diego has lots to offer and the Coronado is one of the very few hotels that is right on the beach. I would look into it. You would need to plan your own activities, as it is not an all-inclusive, but there is so much to do in the area that I would think it would work out.