We have stayed a couple of times at the Memphis KOA which is in the country, well out of the West Memphis area. For us it was just an overnight, but we would not hesitate to stay here again.
The only other place we have stayed along this route is the Hayti KOA which is across the state line in Missouri. Same thing: overnight and would not hesitate to stay again.
BTW, we are open-minded about KOAs. They are usually not our first choice, but when they are in the right place we are not prejudiced against them. These are two which have been in the right place for us.