Geoff
DONT panic......how long is your trip...( I am going on 22 days to NZ soon and thats the question I keep thinking.)
I have done 3 UA tours.....If you are going for the normal 2 weeks you should be fine without having to do a load of washing the weight allowence should just about see you through. I have before now rinsed a few bits out and got them dry, If not SOME hotels do have washer dryers to turn things around, But who really wants to be bothering with this when your on holiday and the USA tours are full on, if you get stuck just buy a shirt etc while away. I am sure you will be fine, me with 22 days will have to work something out..!!!!!
If I can help you with another question on USA tours ask away.. They are great fun but normally are pretty full on..
Cindy