Good question! I often go to Walnut Creek although I'm not sure why because I'm blocks from BART and SF Centre is so convenient. (Usually it is after work and it's easy for me to get on 24 for work.) Also, from Berkeley, Corte Madera is pretty quick, believe it or not. Walnut Creek has been undergoing renovation and I don't know whether they are at full size again yet. I do like the Valley Fair store, but it is a bit far.
What kind of help am I? I think there will still be plenty of shoppers at WC and could be really crowded if not full-sized yet. SF could be fun and BART couldn't be more convenient, unless you buy a lot.
It would be fun to go together! I am realizing that I have crazy plans, though, that weekend and am out of town Saturday, busy Sunday afternoon at the museum! I'm also planning to have dinner with Sarah Baker at her film fest Friday night in the city and I don't know if she has any interest on hitting the sale. Potentially we could do some browsing all together? Just a thought.