Alleyyooper - You have a good point, but a lot of people that I know that bait are a lot farther north than me. I hunt southern MI and don't bait here. All of the corn is up around me still. However my family lives in the UP and they bait a lot. The hunting is just so different up there.

Usually they start baiting early in the year. I cant remember for sure, but I feel like they start in September. They bring more bait out regularly, so I don't know if it affects them much as the deer are used to it. I'm not speaking from experience though so I could be wrong.