Find the Redwood that shades Forest Hut at sunset.
The text on the map describes how Old Man Dufrane wanted his riches to be found by someone smart enough to crack his encoded map. He broke his decoder ring into two parts and hid them on his land.
The text ends with a clue as to where one piece of the decoder ring can be found.
"Many trees have I, but you seek the one,
That defends my hut from the setting sun."
This tree has been cut down by loggers.
This is the tree... rather, it was...
Maybe the loggers at the nearby camp still have the wood...
Maybe the clue is still intact.