I have to agree with the other ladies, I think we got back to Seattle last year about 4:00 pm. The border crossing coming back into the states was excruciatingly slow, and we didn't even have to unload our luggage, but some of the other busses did. And you never know with traffic going back into town on a weekend. Better to take the later flight and not have to worry! We also had to wait around for the truck with our bikes to get there.
We heard the story about the moron who left his passport on his luggage, they used that as a bad example of what can go terribly wrong if you don't listen (or bother to READ) the instructions they give you.
"Don't go too fast, but I go pretty far"