Tsali if you wanna hit NC. Awesome central camping area with a rotating schedule of trails alternating use between riders and hikers/equestrians; trails are one-way, butter-smooth, fast, flowy XC. They even have a bike wash in the camping area. And you can get to Pisgah/Bent Creek, too...probably camping out there, but I've never done it.
Doesn't Ringwood or someplace in NJ have good riding? It's a state park, so it should have camping, no?