actually, acme mapper didn't show the scar pass route over the NE corner of the Olympics.
I would avoid computer maps at all costs except at home. you're going to need some paper maps.
USFS best, USGS topo great, green trails and the olympic specific ones are very, very good for road access, if not completely up to date, very good with almost all rideable routes across the terrain of Washington state.
to plan rides in Washington, get a Delorme gazateer.