I am planning a trip to Sonoma for my 30th birthday in mid-September. There will be a total of 6 girls going, all first timers. We are thinking about renting a house instead of a hotel, or getting a condo downtown. What areas would be the best to stay in (including surrounding towns)? We would prefer to be able to walk to shopping and/or dining from where we stay. Also, there are several tours that I have read reviews about. Is it worth signing up for a bus tour, or would it be better if we drove to each place (one of the girls does not drink)? I am still looking into wineries and vineyards if we drove ourselves, but would like to see Ledson and St. Francis (I like red wine) and would also be willing to go into Napa if there are any other suggestions. We are trying to have the best experience on a budget and will be there for 4 days/3 nights.