cutty
I have never dried osage, just local whitewoods, but pat has a point about getting some of the moisture out at below freezing temps might be hard to do
where ever you decide to put it too help it dry, do yourself a favor and put it someplace where you are likely to look at it whenever you walk by. I have lost some nice staves by putting them somewhere and forgetting about them for too long.
when it warms up, you might find that your out of the way place is too damp... or buggy or whatever...