Thanks for all the input! I'm leaning towards the following, based on the FT recommendations:

- Bring the suit with me on the plane (it's not mandatory for the exam but certainly recommended)
- Wear a "backup" coat-and-khakis (if USAir somehow loses it while I'm wearing it, I suppose I have greater problems than the exam )
- Use the shower as an impromptu steamer at the destination. This is brilliant! I've used that trick before, now that I think about it, but I had forgotten all about it. Thanks for jogging my memory.