Honey Locust tree is a bit different from many other tree kinds as its trunk is covered with barbs grouped in knots. Supposedly it's name comes from its legumes that have honey like taste and according to Wikipedia article can be used to make beer. Here is one recipe that I came across on the Web:
From Dietotherapy, William Fitch, 1918:
The pods of the honey locust are eaten raw and sold in confectioner's shops. A delightful beverage, locust beer, is made by breaking up the dried pods, adding dried American persimmons and dried apples, placing the whole in a barrel and pouring boiling water on the mass and allowing it to undergo fermentation. When three or four days have elapsed, a beautiful port wine colored "beer" is produced, possessing an alluring piquant taste with some "kick" in it.
I was a little surprised when I came across this kind of tree as it seems to be relatively rare in New Jersey.
The cache (a small pill bottle) is hidden on the river side of the trail, across the path from the honey locust trees.