Just one more agreeing - Without seeing the whole picture of where you hunt, if the are woods "lines" or wooded draws or wooded fence lines along the edges of this corn field, the deer will be using this for cover to travel to and from this food source. Look for a heavily used trail or junction of several trails in the woods, off the field 30-50 yards and hopfully there wiil be a good set-up spot. Play the wind with the stand location(s) and hope for the best. These spots are usually a good place to try.
It has been my expereince that in the afternoons, the more mature deer often hold up off a field until "dark:30", then step into the field late to feed. Often past archery gear shooting light. But you might be able to see well enough back in the woods woods 30-45 miutes earlier in the day for a clean shot.
Good hunting !