Sorry for your loss. Where I fly 200' west of the entire length of runway it is almost a jungle, under growth, trees 40' high, plus a small river. In the 38 years of flying there is must have eaten about 300+ planes. About the only thing you can do is realign yourself from the flight line and where you estimated where it when in. Turn around 180 degrees and have a reference point backwards. Then start walking to where you think it went in, occasionally looking back at your reference point. I had a few airplanes go down in the jungle but was lucky enough to find them. Now days I do nothing short field landing approaches, which keeps the plane close on landing approaches. Best of luck.