I find Hazel doesn't mind being seasoned quite quickly, so if you want to speed it up, split your poles (or saw 'em as they can twist a bit), de-bark, paint the ends and put 'em somewhere warm.
I've had one ready to work in a month by putting on a radiator that only gets upto 38 degrees C.
Have a look at my site (click the globe sybol under my username), there's a whole page of Hazel bows, I even got one with some bark left on, one of my fave' bows althought it's lost a few pounds now.
I've worked it green and then seasoned it too. It takes heat treatment quite happilly (350-400C is what I used).
I think Hazel is an under-rated wood if keep it fairly wide near the grip, pyramid style.
4" diameter is just right!
Del