I have found the when the timbers are sitting stacked, that even a well stickered pile of timber will collect ambient moisture and thus mold and mildew. we will get planed timbers from the planer mill that have a little rough sawn still on them( no mold ), two weeks later (mold only and the rough sawn.) This may not be an issue depending on your climate but something to consider. Plane 'em, the wife will love ya