Judy, I will mention one other park where we have stayed several times in the Vicksburg area: Askew's Landing RV Park at Edwards, MS about 20 miles east of Vicksburg. It would not be everyone's cup of tea but it is in a relaxing, rural setting. They do have a swimming pool but we have never used it so cannot make any evaluation. It is not convenient to the city and they do not have WIFI, but it is a peaceful overnight stop. Sites are not paved, just grass.
With all these limitations, you may wonder why I bring it up. Click here for the answer:
Askew's Landing