The SDHGPA has updated their web site and the San Diego Free Flight Site Guide.
For the latest info on flying San Diego County Sites, be sure to check out the SDHGPA Site Guide prior to flying as this information changes regularly. http://www.sdhgpa.com/sites-guide.html
This is the official source for site information and flight protocols for: Laguna, Palomar, Horse Canyon, Big Black, Little Back, Blossom Valley, and Otay Mesa.
San Diego Pilots use twitter for day of site call and coordination. A small window portion of the twitter feed can be seen on: http://www.sdhgpa.com/whats-happening.html