I thought the best reason for feeding corn was to get deer used to your smell. Deer smells you and says "hmm, smells like my food." Instead of "hmm, I better throw tail in air and run."
Have a good friend that feeds the deer on the far side his land by hauling it out in pails everyday or so in the back of his 4-wheeler. He has been doing it for years. The deer are so accustomed to it, that all he has to do is start the 4-wheeler by the garage and they start to come outta the woods heading toward the feeding spot.