Just how exactly can two people get lost on their OWN island?
Getting back to camp isn't THAT hard. Walk in a straight line (using the sun as a reference point, you can walk directly towards the sun. When you get to water, follow the water around the island until you get to camp.
It's not like they are in a HUGE forest, think of the distance they cover going to challenges.
Here's to hoping they forfeit the game! /clinks-glasses