I'd do it if I could get face time with a company I really wanted to work for and thought I had a reasonable shot. That said, I went to the AeroCrew job fair in late 2010 when pickings were slim. The two marquee names that showed up were on everyone's list and I wasn't competitive in that crowd. I got my current job by sending in a resume with no internal recs and got lucky. Do what feels right to you and you won't regret it.