How about Singletary/Rayburn? I have been out to Singletary quite a bit this year. Trails are in great shape. Not super tech, some good climbs and no real drops to speak of.
Oh and theres Ribbon Candy/Goat Hill too in Northbridge.
I rode Whitehall today. Sorry to say It was awful. My first time there and my last. If that was the last place on earth open to MTB's Id buy a road bike.