Retired CHP here.
1. Get reservations for Alcatraz tour. It is busy and they only allow so many a day on the "Rock".
2. CA1 is doable provided:
A. Weather cooperates. It can be gorgeous or horrid along CA1 that time of year.
B. Your passengers don't mind being right next to sheer, 500 foot dropoffs WITH OUT guardrails a significant part of the trip.
C. You are patient. You may get behind a slow poke and basically there is no place to pass. Being in a hurry on CA1 will kill you.
D. Fog can be EXTREMELY thick with visibity less than 10 feet.
E. Be flexible. CA1 closes frequently due to landslides. Be prepared to take 101.
Maybe a bit ambitious but surely doable.
Kids will like Hearst Castle. On the bus ride up ask them to look for zebras. There is a herd of them.
You will love it if weather cooperates.
