I grew up there and that lake is either feast or famine but there are some big crappie in that lake. Nickajack is more river than lake. It does not have big feeder creeks like Chickamauga or Guntersville. Marion county park area between old hwy 41 and I24 is sometimes productive that time of year. Locals call that the Brendaline after a restaurant that use to be there. Bennett lake and Mullins cove are also popular areas.