Place for trotlines for catfish

[MathGeek]

We'll be hitting eastern LA over spring break, and my son has started to hint we might try something different than hitting the passes for big redfish and drum. We're talking about maybe running some trotlines for catfish. The saltwater has crept much further inland than when I was a boy in the 70's and 80's. Would Lake Maurepas, Salvador, or Des Allemandes still be as good as they were back in the day or has saltwater intrusion negatively impacted them? Which one would you pick for late March? Someplace better in SE LA? Any tips on showing my son a good time running a few trotlines would be greatly appreciated.