Don't bother running around killing all the orcs, the PH pops every 6 minutes from the same spot, so just camp that spot.
The loc 1500 500 is correct. It is a little triangular plateau, with 2 trees acting almost as the points of the base of the triangle.
Go to the exact location 1500,500. Turn west and face the flat spot at the top of the little hill you are on, and sit down. An orc pawn will pop every 6 minutes right in front of you, and if you are sitting will probably agro on you. Kill him, but don't loot the corpse. Now sit back down and target the corpse. If you con the corpse, it will tell you how long till it will decay. The next orc pawn will pop about 15 seconds after the corpse decays, so you have your very own PH spawn timer
Eventually, Faelin will pop. She will immediately cast a skin buf and SOW, then take off running. Don't need to hail her, just give her the worn note. If you know where your worn note is in inventory, you should have plenty of time to give it to her before she takes off. Might want to keep SOW up while sitting there just in case, though.
She does despawn immediatly after turn in. The first time I camped her, I waited over three hours for her to spawn. The second time, it took about 30 minutes.