The past few years I have fished on a togue lake on opening day. Last year I only dared to fish along the cove for brookies since the lake completely froze only a few days before Jan 1st. There was 4 inches but it was like glass and that always freaks me out. Id like to think you would atleast be able to fish in she shallow by then. Depends on the lake, temps, wind and rain we get. What lake you looking at?