thanks for the suggestions everyone! In addition to the SF stuff (china town, coit tower, bridges, peir 39, aquarium, some fort & park, golden gate park, science academy, history museum & lookout, cliff house, bum watching, cruise in the bay, shopping, riding the trolleys, etc) I ended up driving down rt. 1 to monterey and carmel and then driving to garrapata state park and hiking, then driving to yosemite to hike three of the waterfalls trails and mirror lake trail in yosemite valley.