Sure, map the route in layers: start with a core loop that covers the high‑value spots, then add random detours that branch off for a limited time, and finally throw in a surprise endpoint that forces a quick recalculation. Keep a running list of “must‑visit” checkpoints so you can back‑track only when the benefit outweighs the cost. The key is to give the players a few fixed anchors, but let the connections between them shift each run, so the hunt feels fresh while every step still pulls toward the goal.