This year we'll do all that AND go into the Greathouse Visitor Center which is actually inside the mountain. It's been closed for a few years and so this is an added bonus which I'm sure kids will enjoy (I'm looking forward to it, too).
We'll meet in the parking lot at 10:30am and head towards the visitor center first. After we'll go explore the Chapparal Loop Trail. We will go up to the Hazel Atlas Portal, Powder Magazine and Stope (Numbers 5, 6 and 7 on the park's map). As always my hand-drawn and not-ever-to-scale maps will be available and will be on our silver Prius' windshield for any late-comers.
Yeah, it's a ways away from urban or suburban Bay Area. But I tell ya, it's worth it. When you get to the park, drive all the way to the end of the road. There's a visitor center on the left as you're driving in - don't stop there. Keep on going till you can't drive no more. Directions and more are here.