I am with Bogaman on this one, peeled and sealed its the only way to insure you won't have bug damage. I mix Diazanon spray strong enough to have the EPA come after me when I have staves I don't feel like removing the bark and sapwood from, it keeps bugs at bay most of the time but there are exceptions.
After going crazy cutting osage early on and working one full month debarking and removing sapwood from one pile I cut, I changed my game plan; I never put more osage on the ground than I can split and peel in a few days. Sure makes things a lot easier and I never loose a stave to bugs.
More advice; buy a quart of shellac, best sealer bar none and super easy to scrape off the backs of your staves when you want to make a bow.
Your attic will be too hot this summer to store green staves in, I tried it and lost every stave to cracks. Of course this was an Alabama summer and it gets HOT.