( 495, 2, -523 ) Copy/waypoint 495, 2, -523 where the beach path enters the forest
Note: When you inspect each camp (click on the barrel), a supply vigilante will spawn and attack you. These are level 21 solo mobs. They do not have to be killed, but are a good way to get out your frustration if you've been running around for countless hours looking for these barrels.