I have a buddy (OA member Jeb) that took the training to get certified. He did it on Beaver lake. He said on the clear end of the lake, they didn't see very many fish, but he did say that you can sit still, pick up a couple of pebbles, click them together and a smallmouth or two will show up to take a look. After hearing that, whenever I am using a c-rig for smallies, I always rig it with a brass clicker and bead, and I'll shake it to call them in.
Jeb did say that mid-lake visibility is not good, you dive down to 20 feet or so and it's tough to see, further than a couple of feet away.
After seeing the post on underwater drones, that may be the way to go to check out bass habitat.