You are correct the south end is totally differnt than the north end. Look at your map and find tobbaco port,there is an island that seperates it from main river channel.There is a cut through on the lower end of that island and it has a ditch that runs on the left side and runs back for a good ways. Caught alot of fish there in mid-april but big fish hadnt moved up in there yet.Check it out and good luck.