From the FAQ:
Q: Do you have a suggested packing list?
A: After joining you’ll receive an information packet with heaps of information including a suggested packing list. Some riders pack quite minimally and choose to purchase new items along the route. (There will also be opportunities to pick up anything you may have forgotten along the way.) You should have underclothes and supplies for a week, with appropriate riding gear for the weather conditions. Most new touring riders actually pack too much stuff that can easily be picked up along the route if needed. Fully-Guided riders can bring a 50-pound bag that will travel in the chase truck.