[Privately, Dipper's not really sure the chance of nudity is really more embarrassing than looking like a gnome. It's embarrassing, sure, and he's not sure he wants to change his clothes all that often now that he's been alerted to this possibility, but he... isn't wearing a gnome costume.]

This sounds like a mystery. I happen to be pretty good at solving those. Do we have a list of who's gone home? Maybe there's a pattern.