There are endless wineries in the Livermore area. Many on Tesla Road where the wedding venue is located.
There are many hiking trails in the area. Some include Pleasanton Ridge Regional Park, Del Valle Regional Park, and many trials surrounding Mount Diablo.
Public transportation is a stress free way of getting to the city. Bart is available at stops in Pleasanton and Dublin. Things to do include seeing the Golden Gate Bridge, Alcatraz Island (requires booking before hand), PIER 39, Fishermans Wharf, Exploratorium, and many more attractions.
For all your shopping needs!
About a two hour drive south from the Bay Area. Monterey is a coastal town with popular attractions including Cannery Row as well as the Monterey Bay Aquarium.