Make sure you visit Rosie's in San Diego.
Amidon Quiltworks in Poway, Cozy Quilt Shop in El Cajon, Quilt in a Day in San Marcos and Quilter's Choice in Chula Vista are all good too.
Here's a link to a shop hop in SC that has a lot of shop listed.
http://www.cruisinquilters.com/html/stores.html
Have a wonderful time and make you share pictures of your purchases when you return.