Denzil .... look for any obstruction that changes the current flow of the river and creates a eddy. Everything from a log, tree, stump, wing dam, bridge pillar, even an underwater island can slow or divert the flow of water ... and Crappie will use the down current/eddy areas of these. Any hard turn in the channel will leave a slower current area in the inside of the bend, and Crappie will use any such area that affords them the slower current. Major creeks that empty into the river are also a prime place to look.
... cp