100% get a laser. ORRRR get a compass with an azimuth. There's a trick we used to do in the military, and its really, really accurate +- maybe a meter or 2. Anyway. SO you shoot an Azmith at your target. Turn 180 degrees left or right. (basically, turn to walk) Walk until the azimuth changes 5 degrees from the original degree of the object. Count the number of steps. Every left step you took multiply by 11. That will give you a damn good distance. (Okay so I can't remember and don't have a magnetic compass near me right now. but its either every other step or every step. 99% sure its every other step.)