He heads out along the river, in the direction of the waterfall he knows is there. That tends to be a good source of resources, he's found. "As far as anyone knows, all they're doing is bringing people here? There's nothing else happening? Someone's just dropping us here, against our will, and that's it?" That's plenty, of course, especially when they undoubtedly all had something other in mind than coming here, but he's trying to establish precisely what they're dealing with.