Here's a close view of the map with Children's Pool and Alligator Head marked. The Cove is just to the east, (right in this picture), of the Bridge Club and Alligator Head.
I also converted the coordinates for the southwest corner of the newly expanded reserve from 32° 51.067' N, 117° 16.400' W to the notation that Google Maps uses, which is 32.85111, -117.2733. You can see the yellow rectangle with the coordinates floating near Alligator Head.
La Jolla MPA.jpg
The next image should help identify the the north-south boundary by sight from the water if this Bing image isn't distorted. The boundary runs due north of Alligator Head so line up the La Valencia Hotel, the pink building with the tower, and the Bridge Club, the low, long white building close to shore, and you should be safely outside the reserve. Alligator Head is actually a little to the east, (left), of the Bridge Club in this image but the Bridge Club is a better landmark.
La Jolla MPA Landmarks.jpg
Lastly, here's a link to an excellent online map with more info about the coastline than you could ever want, including all the MPAs. To see the MPAs is a bit complicated so the last image shows you where to click to get the MPA overlays.
http://southcoast.marinemap.org/marinemap/#
Marine Map.jpg