Need2fish; Spend a lot of time on Google Earth looking back through time on the maps and see what the lakes you want to fish on look like at different levels, after time you will be able to pick out stumps, timber, rocks and contours. They are a great benefit of technology, pay attention to types of points and the banks that will help you figure out where a mudline or current break will develop in a wind condition. There is so much more that goes in to trolling than just dropping a bait behind the boat and putting the boat in gear.