My brother and I really only got to check out the trails leading to and from the overnight camping spots - but the rest of the park looks like a lot of fun, plenty of things to do.
The campsites are about 1 mile from the overnight lot, which was a great hike-in if you don't overpack! We brought a wagon with extra gear with us, but we definitely took in too many items. Ended up pairing it down after night 1 and took extra stuff back to our cars. The hike-in get mostly uphill in the second half with plenty of tree roots and decent sized rocks - for those of you taking in a wagon.
The campsites themselves were great, with plenty of space for 2-3 tents, bear lockers, bathrooms with hand sanitizers, and friendly park rangers to clean up the trash and re-stock the firewood. Make sure you pay for the wood you take, it's on the honor system with a dropbox. We had a family of deer pay us a visit each morning - didn't come across any bears.
We didn't get to check out the Appalachian Trail - but it was only a few miles from the campsites. I'll def. come back! Worth the 7-8 hour trip from both South Carolina and New Hampshire.