Anyone know where or how I can get a map of the lake bottom? Been fishin it from the bank on my Bike and wanted to get a better idea of whats out there. talked to an ol' boy out there yesterday in a kayak that was doin pretty good in and around 12' with a deep divin crank. I was t-rigin a purple tube with no luck. but I got there a lil late. any help with this would be really cool thanks.