The more conventioneers the better as far as I'm concerned.
They don't ride the bus much.
They don't swim in the pool all day.
They don't have 3,000 kids at the dig site.
They don't plug up the line at the water slide.
They don't make the parks more crowded like rooms full of regular vacationers would.
They are generally only out in the evenings, and they're usually not as loud as everyone else.