For the Outer Banks, we were just at Ocean Waves C/G Ocean Waves Campground
The photo on their web site is a little off what the place looks like. While it is a very short distance to the ocean from the C/G (walk over the dunes) the overall condion of the park in and around the RV's makes the place look like a slum area. Every thing from towels to underware is hanging out on awnings and on homemade clothes lines or laying on vehicles. Also a lot of fishing gear etc. just laying around. The plus side is the elect & water was good & the concrete pad was level. Lots of noise with people coming and going at all hours. The C/G sits low, so if it rains, and it did, the C/G turns into a mud hole. This is just our opinion, I'm sure others like it here because of the price.
That said, the Outer Banks is made up of small towns from SR-64 south. The north end of the island is more populated. Between the towns there is not much to see and do. The one restaurant we really liked was Ketch 55 in Avon, which is south of Wave. Loved their Shrimp and Grits, beware it is a bit spicy.
There are two c/g's just north of Ocean Waves and both are twice the price with no shade to be had in either. Ocean Wave had a few spots with shade.
A hint on using RV Park Reviews. Put the zip code in where you want to go and then search.
For Savannah we like this park http://www.hardeevillerv.com/home1024.htm
It's a Passport America park, no real frills, but the water and elect. is good along with the Wi-Fi. We have been to this park several times and have always enjoyed our stay here. They do have a laundry but we have never used it. No pool here either. They just put in a very nice dog park if you travel with one. Sites are grass and or gravel and reasonably level.
Enjoy your trip.