Hi Mark,
There's 18 businesses listed in our RV Links under
RV Rentals, your friend might want to take a look at the list to see if any fit his needs.
Among the 18 businesses listed, there's one in particular that I'd highly recommend,
Innovative RV, who is a sponsor of this website. The owner, Don Fauntleroy, was our wagonmaster at our 2002 National Rally and will also be the wagonmaster of the 2006 National Rally being held in the Smokey Mountains next summer. He's an active member of this site and volunteers his spare time as a moderator here.
Your friend can't go wrong using
Innovative RV.