Smokemont is located a few miles up Newfound Gap Rd from Cherokee, NC and the Oconaluftee visitor's center and farm. You'll have a head start on driving to Clingman's dome to watch the sunrise and you're not far from places to explore on the east side of the Smokies. 

Smokemont is one of the few campgrounds open year round, with loops A & B available in the off-season. I stayed here in early April and there were plenty of open sites. You can make reservations online or take a chance at first-come, first-served. With the exception of two sites offering electric for medical equipment, there are no utilities available. Firewood is available at nearby Towstring Horse Camp. Bathrooms are basic, with flush toilets and running water. Sites are good sized, most with square tent pads; it may be difficult to fit some of the larger tents on these pads. 

Loop F is across a bridge and for RVs only. Some of the sites on the outer edge of the loop are on the river; i liked the looks of sites F34, 35, 38. Sites in the middle of the loop are more open.  None of the other sites in the campground are directly on the river, but they're just across a road and you'll fall asleep to the sound of babbling water and be able to wade in it during the day. D loop sites are largely pull-through sites, great if you have a larger rig. 

If you have a longer stay in the national park, spend a couple of nights here and enjoy all that the area has to offer, then move to another section and explore that area as well. You'll spend less time on the road each day and enjoy your visit more! While here, check out the Mingus Mill, go into Cherokee and learn more about the tribe and its history, and visit the farm at the visitor's center. Keep your eyes open as you drive, esp. in the early morning or at dusk; you may see deer, bear, or elk.