Doing some quick internet research, RV Park Reviews shows three RV parks with basic comments:
Beachcomber Campground
This is indicated to be a small basic RV park, accommodate up to 35 ft, a few sites with 50amp. The sites are crammed into a small area behind the only gas station on the island. There are not good interior roads. They do offer a dump station.
Ocracoke Campground, Cape Hatteras National Seashore
No water/electric, or hot showers, lots of sand spurs, nice beach. Closes at end of October. Nicely spaced asphalt sites though about 30 feet deep on 4 loops. Bathrooms were clean. Cold water showers in separate shacks ("shack" accurate description)
Teeter's Campground
Actually this campground is in someone's backyard. We would not stay here again except in case of emergency - The site was swampy with a grass cover, very unlevel and the electric hookup had no breaker. Access to the site from a public road. The sewer system consists of a network of above-ground pipes, all of which seem to run to the "permanent" residents.
Not many choices.
Jim & Nancy
38ft NewMar Mountain Aire
2013 Honda CRV