I drifted over them as well and caught my motor years ago. I have also learned quite a few other sticky areas through "trial and error."
There is a red buoy marking the farthest west that they stretch. If i come around that buoy and head east, i won't go north until I get close to Lambert's just to make sure I dont hit anything. Sucks having to run all the way around them.
A GPS is a must have for the lake. Its as important to me as my rod n reel. I get on the lake most of the time way before daylight to beat the crowds. So I run in the dark alot. Just follow your track.