"but stuff a few left over flight rations down their necks."
No - all unused in-flight rations would have been bagged up for disposal upon arrival. So, as you don't have that option, work until such time as you need to leave in time to check in, have a wash and change and make it to the restaurant....
After a minimum of 8 hour's sleep, get up, eat breakfast, check out, start working again. Delay? Yes - but that's the consequence of bone-headed beancounters!
Fine in theory. But of course it won't work. The Gingers will work just as hard, but get shafted by a frankly banal system.