Late April will be post spawn for the crappie, so the fish will be more scattered, or at least starting that way. I'd recommend 1/16th oz twister tail jigs or tubes (or both) in a variety of colors so you have what they want. I'd start with chartreuse, white, yellow, black, red/white and a pumpkinseed or watermelonseed. Also some Roadrunner jig heads as well. Make sure you have the rigging and buckets to do minnows if that's what they want. Water level starts to rise toward summer pool on April 1st, but can vary with weather.