After reviewing the map...I have two suggestions for you:
1.) For early ice, target the gravel/stump piles in the deeper water (center of map, far left corner). Fish directly over the structure or just on the edge...but never very far from the main structure.
2.) For late ice, target the deep edges of the emergent/submergent water. The crappy move shallower preparing to spawn, but they still prefer cover to open water.