Originally Posted by Saddlebag
Your best bet is either cedar or pressure treated. I too live in an area of high humidity and my pressure treated posts have been in the ground for 20 years. We pulled a few and they were good a new.
Yep - it's commonly called "Kentucky Board Fence" and is very common in this area. Let me tell you, having lived in both Eastern N.C. And this area (KY/IN) the humidity here is equal to, and sometimes worse than, N.C. Properly treated and maintained, there is no reason you cannot have the fencing you want.