When hunting in corn, I often leave the regular camo at home and stick with lighter-colored clothing (assuming the corn has yellowed). I try to find a spot the planter missed the end of a row, or where the deer have knocked some down so I can sit about 10 feet back from the edge of the corn. This way they can't spot me until they walk right in front of me, in my shooting lane. Makes for short notice that one is coming, but I have found it very effective. Just make sure you have stalks/leaves cleared to draw your bow without hitting anything and making noise.

My other strategy if there is browse they like at the edge of the corn is to scout where they are coming out. Then pick a breezy day, wait for one I like to come out, and then cut back about 50-60 feet into the corn and slowly stalk through the corn into position (hence the need for a breeze to give you noise cover). Sneak to the edge 20-30 yards to the downwind side, ease out and shoot.