Hiya! I live in San Diego county. La Jolla is the most exclusive section, as you probably know.
Coronado is just south of Mission Bay, and is a must-visit for your trip. It's the largest resort on the western coastline. Have you seen the film, Some Like It Hot? Part of it was filmed at the Hotel del Coronado.
Between Mission Bay and Coronado is Old Town, the oldest community in the city. Cobblestone streets... quaint and otherworldly.
There's the Maritime Museum - you can't miss it. It'll be right there at the harbor where the tall ships and the warships are anchored. We walked past the USS Midway when we met friends for dinner last month. There's the Birch Aquarium and Sea World, as well as the SD Zoo or its sister, the Wild Animal Park, which is about 10 miles from my house in north county.
During June, the county fair will be held at the Del Mar fairgrounds. Opening day for horse racing isn't until July 18th. It's a lovely town right on the ocean, north of San Diego.
There's tons o' stuff to do and see. So why am I sitting here telling you about it? I'm on vacation this week.
PM me if you like.