My husband and I are driving from Seattle, starting on Oct 14 and going south along the coast (US 101 and CA 1) to San Francisco. We have to be in SF on the evening of Oct 17. That is 4 days driving down the coast. We are looking forward to the wonderful scenery on the coast, of course, but what especially should we be sure not to miss and where are the good places to stay? We like to walk in nature (not strenuous cliff climbs - we are in out late 60s) and visit interesting historical and natural places. We want comfortable places to sleep but don't need anything swank. We don't care much for cities. Any suggestions?