I think if you take off the bark and seal them,, they will be ok,,
I have had osage outside exposed to the elements for years,, and then make a bow,,
but it is like gold,, so if you can protect it a bit that is the best way to go
people find dead logs laying in the woods and get good wood from it,, fence post etc,,
and I don't think it would hurt to seal the whole thing,, or paint the whole stave,, to prevent checking,,