Pick out a big creek that has lots of channel turns and points and BAIT. You can pick out some interesting creeks on your map and then spot check the creeks for bait. Treat that creek as the lake, don't worry about the whole body of water. Then use what you already know, like where that fish should be during that time of year. Whether it be on the main channel, mouths of the coves, or in the backs of the creek/coves. You'll be able to eliminate a lot of non productive water fast. Right now, in most of the Carolinas (sorry I don't know anything about Indiana), crappie should be starting to gather in the mouths of the creek channels. As the water warms, they will start moving toward the backs of creeks and coves. There will be a constant movement of fish going to toward the banks and then back to deeper water until early summer. You just have to follow them! Good Luck!