I will book this trip for my parents,

[Bella]

I advise your parents their book a 2-Day San Francisco to Yosemite National Park, Kings Canyon National Park, and Redwood National and State Park Tour. They will give you a 3% discount. I advise your parents for outdoor activities. They are:
Fly Fishing
Horseback Riding
Whitewater Rafting
Rock Climbing
Stand-up Paddleboarding
Camping