There's a couple of deep holes in that lake. They're separated by a shelf in the middle of the lake. I've done well coming over the shelf and dropping the riggers as best I could to follow the countour of the shelf.
Seems that the big lakers (20 pounders) are always caught ice fishing.
If you have to use the public launch, good luck. Sand bottom and very shallow. Crappiest public launch in the area.