I think you will be impressed with the amount of trials available to you in 2WD.

For instance:
Blair Valley, Sandstone Canyon, Canyon Sin Nombre, Mortero Wash, Los Pinos Lookout, McCain Valley, and Table Mountain are all within a relatively short drive of San Diego.

Get with Southern California Club Xterra (SCCX) where we regularly run 2WD friendly trails.

Take care,
Travis