Any thoughts on regional interviews?

What have you guys heard about regional interviews? I am supposed to fly to Baltimore in a week and a half and I'm a little spooked. I noticed on interviewfeedback that one person had a regional interview in SF but they never got back on to say if they'd gotten in or not (so the answer is probably no). I would love to see the school but is it worth flying across the country? I was so excited about this interview and now I have no idea what to do.