Hi Rhys,
I went to Rooky Ricardos in San Francisco when we had our Holiday in California a couple of years ago,
purchased around ten records which are still in my collection,he has some good stuff in his shop,
just allow plenty of time to search for what you are looking for.
Just one tip,my access to the shop took me along the edge of the TENDERLOIN district walking,
do plenty of research for your route and keep a watchful eye if in or around this area,it can get
very interesting at times even in daylight !!!,I had a few moments which left some memories.
I left my wife shopping in Macy's in Union Square,a safer option ,told her about the Tenderloin
and the stories later,you will be fine just be careful my friend,if you decide to visit.
San Diego is our favourite city,a fabulous place,home of the US Pacific Naval fleet,
a really great place,be sure to have a meal in the Gaslamp Quarter at night,really cool.
Go over the bridge to Coronado,another great area,the bridge is really steep driving
over it,my wife could not look out of the car!!!.
Hope you have a great working holiday and find some great records on your travels mate.
Be careful and safe,
All the best,KTF,Ron.