There are a lot of "if"'s out there. I would say the bucks you are seeing are from the general area. I can't see bucks traveling any distance for corn in the early part of the season. In late season, yes. Once the breeding season gets in their head things will change. If you don't have a good doe population, you probably won't see much of those bucks. You should be doing something to attract and keep does around. Haveing a good doe population could bring you bucks from other areas.
never say never
patience is the companion of wisdom