What to look for Perch on Cascade?

[atvtrailrider]

We fished at Poisen last weekend and caught a few but not many. We are new to Ice fishing. Most people around Poisen weren't having luck but people fishing in other areas were.

So if I am looking at a contour map of Lake Cascade what am I looking for for good Perch fishing areas? How deep? flat areas, points?

Thanks
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