Rum Barrel in Padres?

[Deltore]

I need to get a rum barrel in Padres Island.I looked just about everywhere.I started with the easiest places the gypsy's nothing
Where the scorpions are at-Nothing
On the right side out side of the fort-Nothing
By the cave where to fort is-Nothing
I even went in the caves to try to find this,no luck everything says nothing interesting here.So please if someone could tell me where to find this chest I would really appreciate it.Thanks