The North Carolina 2010 salary survey for counties is out. Here is the link to the Planning Directors, Senior Planners, and Planners table. It gives Low/High of the county range and the actual or average (in the case of multiple planners).
It could provide a jumping off point if you are interviewing in the state to have a legitimate request if asked at an interview.
Here is the link for all the tables for other professions such as Parks Dept, Engineers, Police, Fire, Management, Etc.- http://www.sog.unc.edu/pubs/electron.../csalindex.htm