My wife and I are visiting Sonoma with some other couples over the New Year's holiday. We're staying a couple of nights in Sonoma at the Marriot Lodge and then head up about 35 miles to a Healdsburg B&B for two more. We're setting aside a 1/2 day on New Year's Eve to visit wineries, and then another 1/2 day on January 2 in Healdsburg. I've been appointed winery researcher for the group, so please drop me some recommendations! In terms of what we're looking for, I'm trying to cull together some accessible wineries which have nice tours, fun tasting rooms and are well respected. Thanks for your help.