Let me add my +1 on this. I've only been fishing these lakes a few years and that only a few times a year. So I can't add any local knowledge but I HAVE learned what hitting a stump, even under 10mph, will do! At the least, it can ruin your day with a busted prop if not your motor! If you have maps on your electronics, good, use 'em. Navionics also helps. But the lake, especially the upper end, is shallow, generally speaking everywhere outside of the channels, and full of stumps.
Be careful, keep a good eye out & if traveling to a different area, use those maps. Take your time & if you can follow a local all the better. The channel markers are widely spaced and can be confusing. There's a reason a lot, if not most, of the locals use flat bottom aluminum boats in their various forms. Next choice is a shallow draft pontoon.