We took our horses and stayed at the horse campground. Electric, water, and sewer hookups at each site. 10' x 10' pipe corrals for the horses, all of them shaded. Primitive camp otherwise -- no showers, bathhouse, gift shop, concession, etc. but we didn't go to shop and primp. We went to ride. The trails are fantastic. We saw LOTS of wild game. We went Sunday--Tuesday and were literally the only people at the horse campground and the only people riding the trails -- a 4,000 acre private wilderness, all to ourselves.
Big Ridge also has a campground for just regular campers, which has a bathhouse and toilets and sites available ranging from tents to big rigs.