a shallow lake i would look for deep channels in a curve with brusk or stumps . if nothing present . put out some condoes in th deeper water . like bambo . keep it 3 to 4 ft. below serface or go to something like this .
http://www.crappie.com/gr8vb3/showthread.php?t=10887
this may be to high but you can cut it down to be shorter .
http://www.crappie.com/gr8vb3/showthread.php?t=13109