Ah well, I guess it doesn't exist. I think this would be a very simple way to represent sleeping soldiers without a script. If the alarm is raised, sleepers in beds disembark and run to their action stations, making a sneaky mission more difficult, if detected. Or, if you feel like being mean, you can invade the tents and shoot the sleeping soldiers, making your escape easier.
Perhaps it would be possible to have rotating shifts of soldiers, where the sleepers wake up and replace guards, who then go to the tents. This process could be repeated over long periods of time, maybe.