I'm a computer scientist; I see trees a little differently. To solve this puzzle, learn a little about how we walk through trees. Posted coords are good for parking. This is state game lands, so WEAR ORANGE.
Puzzle shows binary trees with nodes that have left and right sub-trees below them. If you take an in-order walk through the trees, you will find the coordinates. In-order means you visit the left sub-tree, then the node, and then the right sub-tree. The Wikipedia page on tree traversals might help but may be more confusing.
