Another option is to go north on 5 to Redding, and then west on 299 to Eureka. The way previously mentioned focuses more on the coast from Bodega-Ft Bragg, while this option focuses more on the coast from Eureka north. You may be aware that there is no road along the coast from a few miles north of Ft Bragg to just south of Eureka. This is called the Lost Coast, for that reason. It is accessible by roads in from 101, such as the road from 101 to Shelter Cove, which is a beautiful hideaway and well worth visiting, but it's strictly in and back. There are no accommodations to speak of from Redding to Eureka, but plenty of RV accommodations in both places, if you wanted to break the trip from Chico to Eureka into two days.