During your meet and greet with the recruiters, always
remember your manners; politeness goes a long way in building
a lasting positive impression.
How does politeness manifest itself?
Don't overstay your welcome; meet with the recruiter, make your pitch,
get the key information you need, but don't linger too long -- especially if
there is a long line of people behind you.
Maintain a comfortable distance; when talking with the recruiter, you
want to be close enough to be able to communicate, but not so close that
you invade the recruiter's personal space.
Ask if the recruiter needs anything; most fairs have a refreshment station for
recruiters, but if they are swamped they often don't have the time to get
refreshments, so offering to get them a water or soda can make a big impact.
Always, always, always thank the recruiter for his or her time.