I'm not sure what you are doing, but Hunt lasts for hours. Just keep an eye out for mobs that see though hunt (will have red outline around their name even if you are using Hunt). To get to the Brewers don't go though the main part of Blackburrow. In Antonica you can follow the Southern Coastline from the Docks near lighthouse till you see some islands that have trees that have fallen over connecting them like bridges. Past those island while in the water (look at your online map and you will be as far south as you can be without the map scrolling to the second half) there is a cave that leads under water. Go though that cave and when you can come up for air, do so and turn on your Hunt App2. With that applied you can stroll past the gnolls that are inside the cave and go to a door on the back wall. That is a back entry to Blackburrow. Once inside (with Hunt App2 still applied) go down the path till you see some gnolls. These are the Brewers, just wait there and the quest mob will run past and your quest journal will update. You are done with that part and can leave the way you came in.
--- Luniyn Leaftracer - Ranger