Ice fishing Lower or Upper Kananaskis?

[kissarmygeneral]

Hi everyone,
My first post but I have been reading your threads for a while now, very helpful and knowledgeable members.
I have fished both upper and lower K during open water seasons (on the fly) and have had pretty good luck in both. I'm pretty green to ice fishing and need some advice. I'v heard upper is a lot tougher to find action in the winter. Is this true? Is it better to stick to Lower?
Thanks!