The pile is going to have to have more put on it for weight though. I thought so but, DH was hoping not. It's windy today and the wind is getting under the plastic and raising it up. Not good.
Rain is not going to get to it, believe me. It would have to get the plastic out from under the round bales to do that. But the wind can get in inbetween the bales and then up and under. That breaks the seal and let's air in. Air in means spoilage.