I can't tell you how many times I've been asked, "You've been to Walla Walla, haven't you?"  And every time, I had to answer "no".  Until this past weekend. I took the scenic four-hour drive up the Columbia Gorge to WW this past weekend to attend the annual Wine Bloggers Conference, a global gathering of a few hundred wine writers/bloggers/publicists/social media mavens. The conference was great.  But Walla Walla was great-er.    Stroll around the downtown historic district and you half expect to see Andy and Barney Fife patrolling the sidewalks.  It...