Went to both entrances to the park. The Frozen Creek side has the larger hiking trails running 5-7 miles. The main entrance has a new visitor center. I can't remember the name of that entrance. From this entrance you can hike to the Rainbow Falls. It's a beautiful waterfall. The 3 mile walk is a little tough but anyone in reasonable health seemed to be making it. I was there on a Saturday and this place is popular on nice days.
There are 2 other waterfalls you could reach from this entrance. These are only about mile walks to get to.
Campsites were located close to each other and don't offer much of a view. There is a hiking trail nearby but I didn't check that out. Paying for camping was easy just stop by building on the way in, find a site, fill out the envelope, and drop the $14 in it and drop it back at the building at the front. They have a nice bathroom with running water and a sink outside for dishes. Each site for tents had a picnic table and firepit.
Very cute area for people with horses. They have lil stalls and trails for riders. Not listed as private on the campground map of the Smokey Mountains however it is very small and from what I could find there was no way to know if there will be sites available until you arrive. They were full when I got there so I didn't actually can't here. Sites themselves were close together and not private from each other.
Clean park with a lot of things to do. Has tennis courts, basket ball courts, nice playground with swings and sandbox.