A ski pole makes a good arrow finder, also. (Cross-country better than downhill because of the tip shape). Drag it lightly in two foot perpendicular paths to the arrow's flight.
Where my target hangs there are dozens of 6" to 12" pieces of barbed wire just under the surface. (And old shotshell brass, nails, .22LR bullets and brass, lead shot, slugs, fence staples, everything but valuables). Must be someone hacked a strand or two of wire up on a brush-hog some time past. I have two metal detectors and neither is of much use finding the arrow tip. An aluminum shaft would be cake because you could select out iron.