I'm surprised you didn't catch any gills. There seems to be a lot in there when I fish it in the summer. You might try some of the other waters around Preston. Through the ice I think that there are alot better fisheries than Winder.
The integration of sonar, GPS and digital mapping is an untouchable trifecta of technologies that help anglers catch more fish. And today there are a lot of “good” units on the market that will do just that.