I have a friend living with me right now and she's about to embark on a months-long trip to Asia. She's traveling light and showed me a dress that makes this possible. The Karina Dress never wrinkles. It just doesn't. She twists it up and throws it in her suitcase and when she pulls it back out, it's ready to go! (She told me she once hiked up a mountain in the dress and then went to tea afterward.) The dresses come in a ton of different prints and styles to fit every taste and body type!
The dresses are a bit pricey (around $100) but they're having a spring cleaning sale right now! Check them out!