It never fails. I always leave for a trip knowing I've forgotten something, and it's kind of a relief when I figure out what that something is and it's a minor something, like a toothbrush, rather than some disastrous thing, like forgetting to unplug the iron.
My syllabi are something like that: There's always an error somewhere. This one says that my Ethics students' reaction papers should use their student ID numbers in place of the Running Head as their only identifier---which does me no good at all should the pages of a paper become separated, because the Running Head only appears on the front! I meant to say, "manuscript page header", which appears on every page.
E-mailed everybody and got that straightened out before the first paper is due. Heaved a big sigh of relief.
If that's my only misstatement, we'll be in good shape.