Flight
Nearest airports are SFO, OAK, SMF, and STS. There's no public transit from the airports to Napa - your best options are to grab a rental car or share an uber/lyft. An uber from SFO should be around $110.
Hotel
Our room block is full but you can book a room directly with the resort at silveradoresort.com All wedding events are here so we recommend staying at the resort for maximum convenience. There are also plenty of hotels in the downtown Napa area, which is less than 15 minutes away. For more economical options, check out American Canyon which is only 20 minutes away.