Everose if you are going to Southern California check out the website for the quilt run as it has driving directions and info about many shops......handy even if not on the run dates
www.quiltersrun.com
in central coast try the
www.quiltshopsofthecentralcoast.com
this one is over but the information is good for the coast from Ventura to Montery/Big Sur
that covers the thousand miles (as the crow flies ) I have experience with, the other half of California probably has similar web pages. Shops on the lists for 2012 are most likely to still be in business.