As former Californians, we visited the Ft. Bragg area a number of times through the years.
I'd recommend a ride on the Skunk Train that goes between Ft. Bragg & Willits CA. You can do either a round trip all the way into Willits, or go only part way, then back to Ft. Bragg depending on your schedule.
Also check out the Sea Glass Museum, the beautiful Botanical Gardens and Noyo Beach.
Now I'm kind of missing the beautiful northern CA coast!