To me PCH doesn't get good till your above Santa Barbara, Moro bay ,San Simieon, Monterey, I would say santa Barbara and work north. North of Frisco is great. It depends on how much riding you want to do. If you based out of Eureka it would be cheaper lodgings and work south. Famous quote from Mark Twain was "the coldest winter I ever spent,was a summer in San Francisco"
+1 But I would start a little further South like Malibu/Agoura and do a run on Mulholland to the Famous Biker Rock Store (Everyone should do the Snake at least once). and then head North on Hwy 1 PCH. Hit the following:
1. Santa Barbara - Santa Barbara Pier
2. Guadalupe - a little town if you blink you might miss it but stop by the Far Western Tavern (a famous Biker Tavern good food).
3. Pismo Beach - beautiful scenery
4. Availa Beach
5. San Luis Obispo
6. Morro Bay
7. Cambria- Tons of Winery
8. San Simeon - Hearst Castle
9. Big Sur
10. Monterey -Cannery Row, Pebble Beach, Aquarium, Seaside, Laguna Seca
11. Santa Cruz - Board Walk
12. Half Moon bay
13. SF- Pier 39, Golden gate
14. Sausalito
15. Napa Valley all the way up to Eureka is just mind blowing
Its one beautiful ride. I always take California for granted until I drive up the coast and it reminds me how beautiful this state really is.