I have found that generally the deer are not very comfortable in fields during day light hours this time of year. I prefer to hunt afternoon/evenings on a good stand of red oaks. White oaks are hot when dropping but they rot quickly and the red oaks keep pretty well so that is what I key on. Also, I have read & heard that corn is a hot food source late as it is the highest source of carbos which is a whitetail's greatest nutrient need this time of year. There's my 2 cents worth.