Craig will have to validate my information, but a couple weeks ago he said he was going to go with the company BTI Whitewater (AKA Butt Tubes Inc) which is based out of Harpers Ferry, WV.
http://www.btiwhitewater.com/kayaking/
Recreational Kayaking! Enjoy a get-in-and-go hard boat kayaking experience on the scenic flatwater of the Potomac River. Each of our Old Town kayaks comes with a comfort flex adjustable, padded seat and cup holder that allows you to have a stable and comfortable ride.
Experience the freedom and independence of paddling at your own pace. BTI provides the boat, paddle, life vest, and shuttles to and from the river. The half day experience takes about 2 1/2 to 3 1/2 hours. Our kayaks are suitable for ages 12 and up. All kayakers must know how to swim.
Price is $35 for half day. $70 for full day.