Looney's patronus was powerful enough to save the chosen one.
A short hike up a small hill (Hall Point) off of FR 107. Any car should be able to get there if the roads are dry. The letterbox is hidden at the very south end of the flattened summit, but the easiest approach is from the north side of the hill.
This is a letterbox hybrid. In addition to the normal logbook and trade items, it also contains a letterbox stamp, inkpad, and stamp book. Please do not remove the stamp, ink pad, or stamp book. THEY ARE NOT TRADE ITEMS!
There is a clue in the logbook and stampbook that will help you with an upcoming letterbox (particularly the actual stamp). Make note of it.