REal -
Catfish - actually brown bullheads are pretty common in the big lake. I would focus my efforts in the back ends of the shallow mud bottom bays. There are a number areas in various parts of the lake. During the early spring (February/March) the best fishing is during the day and about now the fishing is best during low light periods.

Since the clear up of the lake in the 1960s the numbers of crappies have dropped. The fishinng has gotten even tougher due to the clearer water - much of the year they tend to suspend ove deeper water. During their spawning season - water temepratures in the low 60s you can find they along the shore lines associated with various structure. During the summer you can also find them at times along the out edges of the weed lines at dusk.

Good luck with your search.
Tight lines
S malma