Ty - that is a good question, one that most of us struggle with all the time
i would say watch the wind and play that game. if the wind is blowing across the field to where the deer would normally come out to feed at then i would say head in the woods. on the other hand the wind will mess you up in the middle of the woods too.
i always like hunting over fields but i have shot just as many deer in the middle of the woods. which place is closer to a bedding area.
Just guessing i would probable say the field cuz now its all about eating and sleeping