at the very least, split it into quarters. You can leave the bark on if you want, but spray some bug killer on it. You'll have to wait a year or two to work on it. Or you can strip the bark off and take it down to a growth ring, rough out a bow shape (down to just before floor tiller), and take it in your house. It'll dry in a month or two, then you can finish it. I'm actually planning on doing that to one of my staves in a week or so.