Carlos, SF Randonneur and inveterate bike tourist, has a nice write-up with pics and itinerary points at his site of a moderately challenging overnight trip to Point Reyes Sky Camp, here.

Another version of this trip is to bike a couple miles further (on a beautiful descent) down Limantour Road towards the beach and either camp at Point Reyes’ limantour beach campsite, or stay at the Point Reyes Hostel.