Most camping spots are a little walk away from the restrooms, but the main building has a really nice little store with a small selection of essentials and some cute jewelry. They also serve smoothies, coffee, and some of the most moist and delicious blueberry scones I've ever had in my life! The restrooms are super nice and have showers and very warm water. The grass patches are super level and soft.
It's super close to the top of the creeper trail entrance, so it's perfect to ride your bike right from the campgrounds. There's also a Ike rental shop a few miles down the road, so if you don't want to haul your bikes up the mountain, it's a great and affordable option. They have another store at the base of the mountain, so you can just return them at the end of the trail.