if it's not late fall yet, with freezes and the like, the corn plan will still be alive and growing.
my friend plants corn for his cows. Huge fields of that stuff. Even in late fall, that stuff stands tall. Until his machinery comes in and cuts it down. The whole plant is cut, and stacked into a pile, which they call "Silage" and later fed to the cows during the winter (along with bales of hay).
Anyway, a couple of weeks is no big deal. its not like this stuff has a timer on it to go "Ding" and then it rots. Each plant is maturing at slightly different rates.
Those corn fields are going to be a blind alley. They're planted in LONG rows, and you can't really see past the adjacent rows, though you may hear movement quite readily. It's not hard crossing rows, only a slight impendiment. It's also easy to throw people through them, in case it matters,it leaves open swath.
