Hi there,
Vicksburg Battlefield Campground is one of the most popular camping sites offering full hook-ups at 80 campsites, laundry, a swimming pool, picnic area, etc.
Campsites such as Goshen Springs near Barnett
Reservoir offer plenty of outdoor opportunities and has boat slips, piers, launches, grills and full-hook-ups for around $18.
Other campsites to consider near Barnett Reservoir are: Coal Bluff Campground, Low Head Dam.
Hope this helps
Vacationbuddy