using an alaska chainsaw mill in the forest can save you moving all that nasty bark and wane/slabs.
once you get the big ol' pieces of wood onto sawhorses or bunks or whatever, you'll find that a timber won't roll as easily as a log. you may want to build yourself a timber wrench. imagine an open end wrench, with the opening about as big as the timbers you'll be working and a handle a little shorter than the height of your saw horse. the added leverage makes rolling heavy timbers a one person job.
rolling logs/timbers without a peavey can also be done using a 1" webbing tiedown strapping a 2x4 to the piece for leverage. this can also be done on finished pieces, eg twisting posts to where you want them.
i like the idea of creating a haul road of logs across which you drag your timbers. imagine, cutting down a nice line of trees, falling them exactly into place to create a near effortless route to drag your log/timber to the site. then start hauling from the furthest point, go back, haul the next one, the road disappears from the forest right into your timber frame.