We're going to Hurricane Creek on June 12th. It's about 45 mins from Asheville.
Brown Mountain is also another place. Doesn't look too exciting though. More for dirtbikes I think.
There's also Gulches ORV park in Laurens, SC. Less than 2 hrs from Asheville...I'd like to go there sometime.
Gulches Off*Road Vehicle Park
Stay tuned to the North Carolina threads section.