I was out there below the dam the day they cut the outflow to close to 0 last week from the kayak. It was my first time out there and I was on as much of a recon mission as a fishing mission. I paddled at least 4 miles total exploring both directions from the launch, no crappie. I did catch a decent bass. The water temp was about 54 starting out up to about 56 when I left. The water was a bit murky but cleared up the longer the outflow was stopped. I imagine it's very clear now. Much of the channel is on bedrock or at least very rocky so it's not that deep even on bends. There are no good crappie holes within paddling distance that I could find. You best bet is to use electronics to try to find fish on ledges and edges that have brush. Dipping minnows in fallen trees might work?
Yesterday I had a quick trip on the 428 launch spot. Water temp was 53 and no crappie caught. With the lake up the water was relatively deep.
Keep in mind they might cut the water outflow back on at any time. You don't want to be caught below your launch point if they turn the heavy outflow.