Hi nemesis,
Hubby n I just went to the same areas as what you planned in march/apr for 20 days incl flight time.
Our itinerary in order:
3 days SF (incl 1 day tour to Yosemite), drive down along the coast,
1 day Muir woods, gilroy,
1 day Monterey
1 day Cambria
3 days LA (2D Disneyland)...