/cgl/ - Cosplay & EGL

What do people in complex cosplays actually DO at conventions?

Like, when I go to a con my cosplay doesn't limit my visibility, mobility, ability to handle/buy things, or clarity of speech. The most complex things I've worn are sunglasses or gloves.
But I occasionally see people with helmets/masks that cover their whole head, gauntlets that cover their fingers, and so forth. Like, what do you DO all day at a convention like that, when you can't engage with most of the con stuff? Do you just walk the floor all day long? Do they only wear the full getup for part of the time?