[jasonkester]

I get the impression that people who make this sort of comment have never ridden a night bus with beds.

It is in no way comparable to a sleeper train, which rides on relatively smooth, straight rails and isn't constantly swerving about and dumping everybody on to the ground. You need to "sleep" in this tensed up position where you're wedged in between ends of the bed using your core to keep you in place.

On the sleeper buses in China, you'll often see people standing in the aisle, getting a rest from "sleeping" while building strength for another bout of it.

So yeah, you'll get to Scotland the next morning. But next time you'll take the train and rent your van at the station.