The Mississippi Lower Delta Partnership has a detailed map and paddling plan for the ten mile stretch between Spillway Dam and LeFleur's Bluff State Park, complete with google map, gps coordinates, and points of interest. Check it out here.
I've paddled this route numerous times. It is the Jackson Metro area's most beautiful natural asset. In high water, the entire route can be completed in three hours or less. In low water, it is a bit more of a struggle. But always worth it.