Charlie,
There are three fly shops in the San Diego area. If you go into one they will be very helpful.
They are:
Stroud Tackle on Morena Blvd just west of Mission Bay
San Diego Fly Shop in Solana Beach near the train station
Andy Montana's in Coronado a few blocks from the Hotel Del Coronado.
Also see
www.sdfish.com for local information and bulletin boards including a flyfishing board with local information.
craig smith