I try to find deep drops with some structure like brush or stakes. Night fishing is very quirky. You need decent current. I try to anchor with one rope up current a good ways then another off the transom close by to keep the boat from swinging around.
If you can find a bridge where you can tie up close to pilings, you will remove a lot of the anchor hassle. Just remember to be patient. You should quickly get a huge baitball under the lights but most times it takes time for the crappie/whites to get active.
Be sure to have and leave your running lights showing. KY and Barkley attract lake lice at night just like in daylight. I've had boats and jet skis come by me after midnight like it was noon and they were headed to a fire. Some without a hint of running lights.