We have a detailed topo map for most any body of water in or bordered by Texas and Louisiana. These are GREAT maps. They are precise, show amazing detail and depths of submerged roads, bridges, breeding pools and more. They have detailed GPS information on them to get you to exactly where the fish are biting.
Also on these maps is a table that shows productive areas for bass, crappie or catfish for any time of year. It is a map of hot spots as picked out by local guides who make a living taking people out to fish these spots.
You can't go wrong with this topo map. It has the detail and accuracy to put you on the fish no matter what time of year or what specie of fish you are going for.