Save The Supply Lines - NWN Side Quest (Chapter 3)
Save the Supply Lines is a side quest that begins by speaking with Rolkid inside of the Mercenary Enclave Building in Beorunna's Well. Ask him if he has any available jobs then ask about the bandits to start this quest. For the first part of this quest you're tasked with hunting down 2 Orc bandits who are found in 2 different areas nearby. After eliminating those 2 orcs the quest will update and send you after one last orc before being finished.
The first Orc leader is named Guzud and you'll find him in a cave on the Fort Ilkard map. In the northwestern most portion of the Fort Ilkard map you'll find a cave guarded by some Ogres and Orcs, this is the cave with Guzud. You'll find Guzud in the middle of the cave but I recommend you clear it all out for EXP.
Below is a quick list of where to find the first 2 orcs you need to defeat.
Guzud: You'll find Guzud in a cave located in the northwestern portion of the Fort Ilkard map.
Vaath: Found in the southeastern corner of the Coldwood map.
When you get Guzud's health low enough he'll surrender and ask you to let him leave. He'll actually give you "Guzud's Head" if you bring up the fact that you need an Orc's head - then if you decide to kill Guzud anyway he doesn't drop a head... Interesting... Either way it doesn't seem like it matters if you let him live or not as you get the same item either way.
Note: In the room behind Guzud you'll find an Elk Tribe prisoner by the name of Uncas. He will give you the Feather of Peace item which can be used as part of the Investigate the Elk Tribe and The Siege of Fort Ilkard side quests.
Vaath is our next target and you'll find him in in the southeastern corner of Coldwood. You can reach the Coldwood map by traveling north from Beorunna's Well, it's the first map north of the main town. The Orc we're looking for is located in a small cubby and will be hard to spot if you're not looking for him. Thankfully if you get anywhere near the cubby he'll come running out to attack you revealing where he is.
You'll get the same choice with Vaath as you did with Guzud, he'll surrender to you and offer you someone else's head if you ask for his. Much like before you'll get Vaath's Head either way and it's the same exact item. Before leaving this area I recommend you loot the nearby chest as it has a Dagger in it which is part of Grimgnaw's Tale.
Once you've got both items return to Rolkid in Beorunna's Well and turn them in. He'll give you some EXP and gold for each head and then offer you a 3rd and final orc to hunt down. This time you'll want to go to Moonwood and specifically a cave on the western side of the map.
Obould Many-Arrows Location: Enter the Moonwood map and go into a cave in the west
You will find Obould Many-Arrows inside of the cave in the middle of the map (pictured above). Unlike the previous 2 enemies he won't surrender when you get him low health so just eliminate him then rob his cave and return to Beorunna's Well to turn this quest in.