Driving straight through from Fortuna to Olympia/Lacey was about 10 hours with about half that on I5.
We did drive 101 North going through Oregon one time and it is pretty twisty but scenic. Ocean views mostly.
Some of the state parks around Crescent City and further South have some really nice scenery, stuff like giant redwood groves and trails to hike.
Road closures or delays due to rock slides are fairly common when there has been lots of rain.
I don't know how many times I made that drive going the opposite way on a friday after formation. Best time was 8 hours by myself. Took about 12 with the wife, and 2 days with 2 little ones.
Eureka doesn't have much in the way of tourist attractions as far as I know.
Maybe Fort Humboldt if you're intersted in Civil War era history.
I'm not sure if the Samoa Cookhouse is still operating. It used to be the main chow hall for all the loggers back in the day. It used to have a bunch of old logging memorabilia on the walls.
I loved going to the cookhouse as a kid. I ate there for the last time before going to Korea, was the last time I saw him alive.
