Having spent over 35 hours in the car over a 5 day period, I would say we really got our bearings for the layout of the Redwoods. We saw some amazing stretches of road. Here are the top 3 of all the driving we did among the Redwoods.
1. Avenue of the Giants
This scenic highway is a very well paved 2 lane road with plenty of traffic. You'll drive through Humboldt Redwoods State Park on your way through the 31 miles through this breathtaking drive. There are plenty of pullouts for hiking and photo opportunities. Beware that some of the trees come right up to the asphalt on the side of the road. It'll thrill you and make your heart jump as you pass them by.
2. Howland Hill on the way to Stout Grove near Jedediah Smith State Park
This drive is more like a safari in the middle of nowhere. You'll pass by the massive redwoods on a dirt one-way road. There are lots of pullouts so that you can pass or allow another car to pass you by if needed. I would definitely not recommend being in a rush through this scenic drive so you don't miss the majesty of the forest and trees.
3. Newton B. Dury Scenic Parkway in Prairie Creek State Park
This scenic parkway has open spaces, or prairies in parts and a closed forest that comes right up to the road on other parts of the drive. It could only take you 30 minutes or less to whiz by the World Heritage Site, but try to take your time enjoying the road and the scenery. Who knows, maybe you'll run into the Roosevelt Elk that hang out near the information center and campground.