The hotel in STL will "rent" you a mini-fridge for the length of your stay for $10. We got one, barely used it. It all depends on the person though. There is a laundry mat down the street...but go there with a friend or 12. Sunday was usually laundry day and a group of us would head down there to study and get our stuff clean. Try to pack as lightly as possible. A couple polo shirts, some khaki pants, and maybe a pair of jeans/tshirt and gym shorts is really all you need. It's not like you can't rewear that stuff once since you're just sitting in an air conditioned building all day. Bring a chartcase as it will make it easier to cart around all the manuals you'll get on the first day.