No, you cannot camp anywhere on the Mississippi River. However, there are numerous campgrounds and designated camping areas along the river, both in public parks and on private land. Some of these campgrounds offer riverfront camping, while others are located nearby. It's important to choose a designated camping area to ensure you're following local regulations and respecting the environment. You can find campgrounds on the Mississippi River near Jackson, Picayune, Vicksburg, and Lucedale.
Remember to always follow the rules and regulations of the specific campground or park where you're staying, and practice Leave No Trace principles to help protect the environment and ensure a great experience for future campers.