Not only was Nabari not hiding his secrets—he wasn't even wary of Zhang Zian and Peter Lee when he was imparting his knowledge to Salem. He even let them write down the GPS coordinates of the stone, making them embarrassed.
So what if they knew the GPS coordinates? It was clearly not possible that they were going to give up on their comfortable lives and jobs in the city to snatch work away from them anyway.
Peter looked at the time. Their fifteen minutes were almost up. He spoke through the walkie-talkie then. "Everyone, return to your cars, and get ready to go."
Zhang Zian returned to his car too. Seeing that all the elfins were back, he asked, "The road is still long ahead of us, so does anyone want to go back into the phone? I'll let you all out when we stop to set up camp for the night."