I think i've found their trash pile in the field that I hunt. It seems like there is one area in the field that consistently produces a lot of broken pieces. There are other areas in the field that I always hunt first, because they produce good, whole artifacts. It's pretty cool how you can learn a field after a while and can almost tell where the trash dumps were. You can also get a general area of where the villages stood by the concentrations of points, tools, etc. You can't tell exactly, but you can get a general idea.