F18 up to F20 -- how?

[Beartooth]

	I have several machines running F18, which I would like to change 
to F20 by some sort of upgrade, rather than a fresh install. Can anyone 
yet guess whether upgrading from a DVD, or using fedup, or yum, or some 
other way is most likely to succeed with the least trouble?

	Among other possibilities, is an upgrade via DVD from F18 to F20 
Beta, followed by yum updates at regular short intervals, any more or 
less promising that fedup? (I've had very mixed experience with that.)

	Btw, this seems to me much more of a question for the regular 
Fedora list; but I tried it there, and a couple of people have referred 
me here.
-- 
Beartooth Staffwright, Neo-Redneck Not Quite Clueless Power User
Remember I have precious (very precious!) little idea where up is.