The Humboldt has better groves than the National Park. The beach at the National Park is nice. My favorite in the Humboldt is the Children's Grove. It is more open and you can see the trees for the forest. The drive and/or walk through the Roosevelt grove is also top notch.
If they still do it the mill tour at Scotia is great. You walk overhead of the mill operations and get to watch the conversion of logs from the mill pond into lumber. The big band mills are the best part.
The galleries at Medocino usually have some Krenov inspired furniture and the restaurants there are great. Headlands here are especially nice. The motel just north of the bridge on the south side of Fort Bragg is a nice and cheap place to stay. Might as well visit the Krenov school while there. At the entry are folders with pictures of the student's work for the past many years.
Montgomery Woods is a Redwood grove recommended by Ron Hock. It may be my favorite. It is quite open and one can see the trees better and there are some especially tall ones there. Hike all the way to the back of the grove to see the tallest trees. Until recently the tallest tree in the world was located here, but then someone found one a bit taller.
Don't know about now but the drive on the back road from Ferndale to South Fork is lovely in the spring. You will wish you were driving a sports car. Last time we drove it we came down the hill into Ferndale and drove right into the middle of a movie shoot for the awful movie Majestic. Some cop was supposed to stop us and I wondered what he was doing by the side of the road. It was fascinating watching them shoot a movie, once we were shooed out of sight.