RE: hunting standing corn edges???
I hunt 5 yds in from the edge, on the corner of a corn field. I saw a ton of deer last year within shooting distance.
The early season afternoon (chase phase of the rut) is when I saw the most deer. They are just starting to scrape on the edges of the fields and the does are running the edges of the field...soon to follow the bucks. 5 yds was enough to break my silouette while still getting a clean shot (no branches).
I highly recommend a daytime scent dripper though. Get them coming to a nearby scrape during the day (counteract the full moon phase). Choose the side of the corn field (if you can) that you can look down the rows of the corn. This will eliminate any surprise element they have. Also, spooked deer with run right through the corn and stop 20-30 yds in the woods to look back. So don't neglect your into the woods shooting lanes.
Best of Luck!