In my experience, the best way to get deer to frequent a plot more is for them to not feel in danger there. Hunting over plots is fun and exciting but they can turn nocturnal pretty quick if they get your scent or see you going in/out.
As far as my opinion on your question, I would do corn. If you don't fertilize the corn, it will likely not grow much if any ears, but the stalks should stay strong for a good while and provide 5-6' of vertical cover until early December.
What about the possibility of putting switchgrass strips in your plot for a perennial plant with little maintenance? Should give you the height you want and not attract bears/coons? 10' wide strip should be enough cover for deer screen from seeing other deer, etc and won't take much volume away from your plot.