Those are some great ideas. My only concern would be the straw bales close to the hives. Here, in NW Ohio, those are often used in the same manner to insulate well housings and some times mobile homes. The issue is that they also become rodent city. You mentioned you already have mouse guards on the bottom - make sure you have them on the top, too.
Mouse damage is not pretty (and I hate the little rascals, too).