Going to Northern California four 4 days!?

My husband and I are planning a trip. We live in Oregon (about 2 hours from the border) we want to go to the Redwoods (well, he does.... i'm not much of a hiker, woods kinda person) and I wanna go see the beach and what not (crescent city) Also, would like to go to San Fran... anyone have any ideas on where to go, and what to do? got an itinerary for me? Thank you