I believe mine two dogs just sleep, unless they need to go out, well the German Shepard anyway, the little one never usually bothers us.
The big guy will pace and then stand there and stare at you. I don't know why he won't whine or something, but he doesn't he just stares you down until you wake up. It's a freaky thing to wake to. LOL

Luckily he doesn't do it very often cause I try to make sure I let them out one last time before bed.