There are 5 good ways to get the information you are seeking, and you will quickly learn ain't none of em cheap.

1. Hire a guide, there are 2 good ones on this board. Chatt and Shane.
2. Fish tournaments on your lake of choice.
3. Offer to split costs with someone who fishes your lake.
4. Spend lots of time searching new areas with good electronics.
5. Utilize waypoints offered up by the KDWP.

There is no miracle with any of these methods, they all require time and money spent.