Is that a county ordinance or a state ordinance? Reason I ask is I get wood permits from FS and BLM all the time and I don't need any kind of trip permit. No one here (Douglas County) has ever been prosecuted for hauling wood either, unless they were stealing 'real' timber off federal or state lands (logs in excess of 8'.)
Those wood permits are transportation permits. They are saying where you got the wood from and that you have permission to take it.
It is an Oregon state law. Here are the various sections...
Oregon Revised Statutes (available online)...
164.813 Unlawful cutting and transport of special forest products.
164.825 Cutting and transport of coniferous trees without permit or bill of sale.
164.845 Arrest, summons for cutting or transport of trees or special forest products; effect of failure to appear.
164.855 Seizure of trees or special forest products cut or transported in violation of ORS 164.813 or 164.825.
Note: Various laws pertain to the transportation of; hay, bear grass, boughs, branches, ferns, bark and needles of the Pacific yew, Cascara bark, Cedar salvage, evergreen foliage and shrubs, ornamental trees and shrubs, round or split posts, poles, pickets, stakes or rails, shake boards, shake-bolts, shingle bolts, mushrooms, and forest plant parts used in floral arrangements and decorations.