Oh Western WA, how I love and hate it. :) It was home for nearly 22 years, and all my family is there, so part of my heart will always reside in that wet and soggy place. On the other hand, how amazing is San Antonio?! (that's rhetorical ;) ) You are lucky to call it home!
I haven't done any fabric shopping while I was in WA but I have ordered from a really great shop in Mukilteo called Seawatch Fabrics. They specialize in batiks and Asian prints. I made a fairly large order with them a couple months back and I can't even begin to say enough good things about the fabric and the service. I would love to see their store.
Have a wonderful and safe trip!