I know Geyserville very well and you should not miss an opportunity to swing off Higway 101 and come for a visit. This website has a lot of good info click here  

You can also take a look here www.tastelocalwines.com for more info about the wines in the area. The surrounding area is really beautiful and some of the best wines in the area can be tasted at Locals. There are three restaurants to choose from, Santi is wonderful for dinner on the patio on a nice summer evening so be sure to request a seat outside.