Thanks so much for all the info. I'm off to visit my niece on Tuesday. She lives in Washougal in southern Washington and Portland is only about 30 minutes away. She just asked me today if I had any place special I wanted to go. Fabric Depot - here I come!
Oh and quiltsrfun is so right about M&L Fabrics in Buena Park. I hit them up about 4 times a year. Their flat fold section is awesome for quilt bacing material, especially for really large quilts.