The Craft Guild of Nevada County marks the 30th anniversary of its annual Winterfaire craft show at the Nevada County Fairgrounds this weekend. “Our club is the very first people who ever held a craft show here,” guild President Barbara Wilson said. But the guild, which pioneered craft shows in Nevada County, is about far more than crafts, said co-chair Shirley Williams. The craft show is the guild’s fundraiser for the year, and members also sponsor other community activities like the Friendship Club, an organization that helps disadvantaged teenaged girls. “We’ve kind of grown,” she said. “It’s a great organization, …