When approaching the Canby Ferry from the north, for the love of Pete, don't go over Pete's Mt Road.
Much better: cross the Willamette at OC, and get on Willamette Falls Dr. It becomes Borland after it crosses the Tualatin River. Turn left on Turner Road, and then left on Mountain Road. Mountain will take you straight to the ferry. All of these roads are quieter than Pete's Mountain and not nearly as steep.