Most definitely.

The day seminar has some good info, some wasted time but it won't hurt you to sit through it.

During the "job fair" portion...yes, hand them a resume. I would also fill out online apps for anyone that you were interested in before hand. Most will match your resume with the online app, and if everything went well "flag" you for your effort (in good way).

It's also a fairly neutral forum where you can ask a Capt/HR questions about your background that may not be good to bring up later (such as, enough hours, experience, goods, others...)

Also, HR having a face to match to a name/resume/app is never bad.

Best case: I talked with the Capt who did my interview at Comair at the AIR, Inc. fair and had previously passed the "tool" check.

Is it required to get an interview/hired? No, but putting the effort/expense to go and talk to a company is always a good thing.

HTH, feel free to PM me.
Spongebob