is there any mud there and is it worth going there on a 4x4
Sport bikes usually stay around the sand pit. There are great hills with trails to run through. Just watch it as it's easy to flip you bike. Several mud holes to run in. Nothing like Holeyland, but worth taking a 4x4. A GPS is really nice to have. I marked a lot of places that I would go to every visit. As I recall it's 2800 acres.
It's worth a ride if you haven't done it before.