I haven't seen a craw yet. The LMR is close my house and still up pretty high. I know the river system is totally different than a lake but some of the same theories apply. Shad survive in cold temps with moderate current. But it would have to be deep moderate current. As far as the ice... Nope not me....always feared walking on ice where in the summer my Lowrance said it was 20'+. I'll sit at home and read about it. LOL