Couple things I've noticed about osage boards Wes. First, they're usually cut from large diameter logs, and you can get a lot a grain swirls as Pat mentioned. Another thing to look for is light and dark patches in the board. That's a good indication a grain deviation. Even using boards, you still want a good early/late wood ratio.
Just as long as you have nice straight grain for hickory about any configuration will work. Hickory degrades rather easily and you won't know how it's condition until you put it to a test. So to save yourself some heartache down the road, take the time to do a bend/break test on some scrape hickory that you'll be using for your backing. Your test piece should take a great bend without completely breaking into, where as a bad piece will easily snap........Art