Here are the coordinates: 43.705580, -70.244082.
From parking area, follow path out to west, and then toward the south. When you get to the Y in the path, take the left fork, just before the wooden blind. (Right fork has a fallen tree across it). Shortly thereafter there's a very small trail to the left that leads to the marsh. Take that and start looking. You'll see two different yellow ribbon flags to your left on the side away from the marsh. At noon today, the SATH was staying low, mostly on the ground and mostly between the two flags.
Good luck!