I'd pay the guy to come and mill it on site. That's worth the headache of trying to manhandle it.
Red cedar comes in at about 25 lbs/cubic foot. If that thing is 30' long and averages about 2 feet in diameter, you're looking at north of a ton. Winching weight is only part of the equation, you need to get it to roll or slide, e.g. skidding it. Maybe you could build a reverse coffer around your yard and float it on the trailer? ;-)
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein