Oak Harbor currently has two incoming trade routes. The benefits are as follows:
Spices: Increase the number of items found by Scavenge.
Hides: Once per day, if you are wearing Costume Armor, you may cast an Oakskin on yourself. If you already have an active Oakskin on you, you gain a second stacked Oakskin. You may not use this if you already have two or more active Oakskins.