Open up Google Earth & use the history bar to go back 10 or 12 years .... then zoom down onto the creeks in the area where you intend to launch. Work the history bar backwards/forwards and watch where the "dry creek areas" had tree growth coming up along the banks (during the years when the water was down for dam repairs). Keep moving the history bar forward until it's "now" and you'll have a good idea of where those Crappie are apt to be thru the year.
I use this site ( Lake Cumberland Water Level ) to tell me what the water levels are. FWIW