I don't advise enticing more deer to your property. First, you will antagonize your neighbors, who will vent their frustration on the deer. Second, unnatural concentrations of deer (and other wildlife) create conduits for disease transmission. I have no doubt that deer already occur in your area at an unnaturally high density, and you shouldn't do anything to increase it. There is an overabundance of deer nearly everywhere, and they are damaging the environment severely.
I sincerely doubt that deer would use a barn as shelter no matter how attractive you try to make it. I just don't think they would feel safe in an enclosed space such as that.