https://www.fishidy.com/map/us/tennessee/reelfoot-lake
I found this map and figured that others might want to see it. I'm not too sure how accurate it is, but it should be close. Maybe the locals can determine whether it's accurate or not?
Well, I see that you have to login to see the map, but it's not hard. Once you create a user profile it shows the lake map and depths of Reelfoot and a lot of other lakes.