San Jose will be the closest. SF is certainly an option as well, but is a bit further away.

Rent a car or uber would be your best options.

No, the venue prohibits all smoking and vaping of tobacco or cannabis. Edibles are fine, however.

The venue is outdoor and most of the festivities will happen in a grass and dirt and all the things one finds on the ground. High heels may not be the best choice, wedges may be a safer bet at this venue. Men's dress shoes will be fine. Hiking boots would be overkill.

Umm idk. Everyone is different. Check the weather and bring layers. It will probably be sunny and 70, but ya never know.

Dressy casual would be best. It's apparently a real term I just learned about. Give it a google.