I've fished in lakes in that area quite a bit. I agree with FH - sight fishing to the cruisers on those lakes is a riot. One technique that I have used with success is anchoring over shallow cruising lanes and using a sink tip line with a dragon or damsel imitation (try a peacock hurl halfback size 4-10). Before you see any cruising fish, cast the line, let it sink so that the fly actually settles into the bottom. When a fish comes into the area, retrieve a short amout of line rapidly such that the fly pops off the bottom. If you get the timing right, the fish are attracted to silt being displaced by the fly, and the fly will have popped up and I think it looks pretty similar to the movement of a dragonfly nymph. Works like a charm.
The chronnie fishing technique works really well too if you like it, but I think the biggest mistake people make when fishing lakes is that they don't anchor. I think you MUST anchor in order to effectively fish lakes (unless you are trolling). The only guy I've seen who could sight fish without trolling was a guy on Whitetail Lake a number of years ago who had a wide bottomed canoe that he could stand up in and paddle from standing up. He would stalk cruisers in the flats this way and cast to them standing in his canoe. I don't think that's a particlarly safe way to fish though and is probably not in the cards if you're in a pontoon boat.
Good luck - those are some great lakes you are getting to fish.