Annual Leave?

"We are about to be invaded. The Barmy Army are on the move.
"This invading army intends to infiltrate thoroughly. They have worked closely with Lion Breweries to ensure their troops never suffer from thirst on this long, arduous invasion.
"There have been all kinds of figures plucked out of the air in estimate of the total number of fans from Britain and Ireland heading for New Zealand. The latest figure is 20,000. And that’s one heck of a lot of extra people to keep supplied with beers, meals, beds and such like. Lions supporters have booked 1800 campervans and 1500 rental cars nationwide.
Now this army are going to travel down our highway from Rotorua after the first game, to New Plymouth. Three days later there is a game in Hamilton and they go back through again heading north. (map)

And guess who removes the rubbish from the rest areas?