A quick note from ACTFL 2007:

Rolling luggage should not be used in lieu of a briefcase.

Seriously, people.

And if you absolutely must drag your little suitcase around all over a crowded convention hall, for pete's sake get this: You do in fact take up three times as much room as others, we don't like to have our feet run over or our shins barked, and the noise they make bouncing down stairs behind you? Is ob-freaking-noxious.