Bring a GPS some of the roads marked on that site are closed/washed out.
Down South near Mt Rainer the roads never opened due to non melted snow.
Be prepared for BIG pypasses.
Aside from that it was a great trip, lot's of "off road" driving and great scenery.
Well that's the kind of jeeping I want to do. I'm trying to document as much as the trail system as possible on video. But the red dots are the short cuts? or abandon logging roads? Those are the challenges right?