Starting six months ago, someone has been stealing supplies and killing anyone, refugee or soldier, in the Bitter Springs refugee camp. The camp was already in bad shape, but this is only making things worse. Captain Gilles figures that the culprit must be operating from somewhere in the nearby mountains, however, Captain Gilles currently lacks the manpower necessary to perform a proper manhunt. She is desperate at this point and asks the Courier for any help they can provide.
Wearing NCR attire or having Boone follow you (because of the 1st Recon's infamy among the Great Khans) causes Oscar to become hostile.
The 'peaceful' speech option does not yield any infamy with the Great Khans.
If Velasco is convinced to take his revenge on Camp McCarran, the next time the camp is entered, he will show up there and attack the forces of the NCR with a mere knife. He will also attack you if you're dressed as a member of the NCR.
When entering one of the caves, there is a scripted event in which a pack of nightstalkers will attack the player. This is inevitable no matter how stealthy the player is. They can still be killed regardless of it being scripted.
Behind the scenes
The quest name is most likely a reference to the The Sound of Music song Climb Ev'ry Mountain (1959).
PlayStation 3Xbox 360 Even if you've been to the cave on top of the mountain and completed the quest, you'll get the reward, but the quest will still be active in your Pip-Boy as if you haven't completed it. Completing the quest No, Not Much should open up the Captain Giles dialogue tree about Oscar, even if you previously spoke to her and the option to tell her about Oscar was not available.