Oregon, washington, Idaho then back to CA ideas

Thanks,
Plan is up the 101 for a return to redwoods national park, up thru coos bay, then up to Shelton, near Tacoma to see nephew. If we can find a spot to dampness side of Olympic would be great. Thinking Oregon to Washington sticking to the coast, avoid big cities.

Fwiw to the riders I will bring either a plated ktm 500exc or a 625 sxc. Interesting dirt trails good, while wife and kid play. Both can do hwy speeds or single track, tho better in their own element.