CA-1 is a beautiful route. Not fast, but lovely. Stop often and look around.
It's worth a side trip to Gowan's Oak Tree fruit stand on CA-128 a little bit west of Philo. They have dozens of varieties of apples that they grow on their adjacent land, and the best apple cider in the world. The adjacent state park, Hendy's Woods, is also very pretty and a good place for a picnic lunch.
A little farther north, I've particularly enjoyed Patrick's Point State Park. It's got a nice campground with big spaces and trees and bushes between them for privacy. There's a pebbly beach, redwoods, grasslands, views out to sea.
Gold Beach has a great picturesque bridge over the Rogue as well as a nice beach.
It should be a great trip!