For walters if you aren't sure where to find them I would troll a crank bait at the various drop offs you've located through out the lake. Once you catch move back to that spot and start jigging with leeches, just the jig head and a leech, no body. Or if you are lazy just keep passing over that drop off, it helps to zig and zag then you will hit a few different depths. Let more line out to get deeper.
This is my favourite crank bait out there, I've always used the perch but lately I find the yellow perch pattern to be the top performer.
http://www.rapala.com/rapala/lures/s...hadRap&start=3
I would say right around now they are sitting in 10-15 feet of water hugging structure at the bottom of a drop off. If you can find a rocky point that is a magnet.. but be weary of your depth and snagging this lure, with the dollar in the crapper they aren't cheap right now.