Phil; a lot of this stuff is done on a barter or cash basis. Good reason for guys with mills to keep a low profile, if you get my drift.
Word of mouth and mostly personal contact... (with the sawyer not the saw). What Charles said. Also, saw sharpening services; if they're not bandsaw mills, they need their circ. blades sharpened.
Another contact source would be tree service guys. They either buck up the trees they fall, or someone is getting them sawn.
You sure a self loading flatdeck won't work for you? I mean hauling the logs to the saw rather than the other way around...a 3' x10' long log is pretty heavy to move without a tractor or equiv.