Hello Thom, one of the things that helped me in my quest is kinda like school, one subject at a time, jesuit priest just by its self is more than enough to cause a burn out in my pea burn so I started with drill holes (no marks carved on trees interest me because I feel that they are of KGC or worse a salted area) and looking for trails and yards, trails lead to yards, seems that a diamond is 2.5 miles ( league ) with 4 directions and will be in the or close to a yard, a triangle is found at the start of a trail and will be at or near a yard, the fighting fish is a good example of a trail that has 4 directions, a triangle that has a direction indicator should be used in a yard, most yards that I have seen are in a rectangle some as large 1000 feet X 600 feet and most will run East and West, trenches, rocks, and everything else that you can imagine