The guards look at each other, clearly nervous. After a moment one of them speaks up. "Uh, your pardon, my lord. We, uh, weren't told to expect anyone tonight. But we'd be happy to take you inside. Your, uh, entourage will have to wait here, of course."
Morvannon recognizes that the guards are not afraid of them, but (presumably) of their employer. I'd better try to head this off before Grakk gets us all killed...