Hm. That was a good question. Ideally he'd get to know all of the area to the next town or whatever landmark, but that's a bit task. Especially when they didn't know how far away from the rest of civilization this place was. So any longer trip would need supplies...but right now, just closer would do. That's what would matter first.

"Not that far yet. Go back to town before it gets dark so we don't get lost." Or run into whatever night time predators are around.