Phil,

I would suggest taking the trunk in the longest sections possible.
(the whole 15' if you can manage) Cherry has an affection for
splitting at the ends, so use a generous coating of anchorseal (or
equivalent) at the cuts.
The longer your pieces are, the more time you'll have to rough good
wood.
Take the opportunity and don't fret if you lose some. Cherry is
wonderful to turn.

Mike