Seal the ends with wood glue or a couple layers of paint or varnish. I always split logs in half the long way with a maul and wedges. That establishes whether there's twist in the grain or not. Once they've been split in half I let them season a few months. I personally spray the bark with insecticide and leave it on. I think it's better if you go ahead and draw knife the bark off and seal the bow back the same as the ends. I'm just lazy. Once the staves are almost dry I split them the rest of the way into staves. I almost never saw an osage log into staves. It's very tough wood, hard on a band saw. They cut OK green, but once dry they're really hard.
Good luck,
George