Great blog post Rita! I'm glad they let Plunkett design all the costumes: for starters, he did a great job but also because for consistency one designer should work on a production. That said, it's common for one designer to do the star's costumes and another to do the minor one. I don't like it though.
My memory (perhaps faulty) tells me that the GWTW costumes were toured, and enthusiastic helpers sprayed them with disinfectants and the like - which of course, deteriorated the fabrics. If I'm thinking of another set of costumes, please correct me but I thought it was Scarlett's.