Not sure how far it will be from where you are staying but this is a really cute shop her is there online link but there shop is adorable not to far from Portland if you take the freeway they moved into a new shop that is all brick on the front.
http://www.hollyhillquiltshoppe.com/map.html
http://www.hollyhillquiltshoppe.com/gallery.html
Another one for unique fabrics and modern fabrics in Portland
http://www.coolcottons.biz/about