Like any other "Service", be it home repair, car repair, lawn care, ... ask around and word of mouth is the best! I'll bet if the guide of choice is busy the day you want to go, he'll recommend another guide. These fellows make a living at providing service and if the service is poor, they won't be around too long. Being at the North River, start with Capt Joe Shutte (sp). Sorry if I spelled your last name wrong Joe. Check in at Chasin Tails, if they give bad advice, you will not shop in their store.
Check Fisherman's Post, Carolina Outdoor Journal (PBS), ... But how would you find any other "Service" company?