I say watch the food sources as mentioned earlier, but get in between the food and their bedding. They've lost body mass from the rut, and the additional stress from winter requires they get enough nutrients. I'd try as hard as possible to sit all day. The mature bucks will have been patterned to moving between 11-2 from hunting pressure ( on top of dawn/dusk/nocturnal parameters), and the requirement for food based on how fast deer digest food.

In early season, bucks might not be as likely to move during midday once the pressure hits. However, the weather requires more heat (calories) to be used up, and the current situation of losing mass from rut makes the midday feeding an almost requirement.

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