"Can you tell me anything about the layout?"

She does have a full map and a count of inhabitants, plus locations and number of prisoners. There's patrols, which she's still working on estimating the patterns of - Aloy will have to figure that one out herself - but she knows the leader's approximate location, plus the definite location of the camp alarm - "If they set that off, reinforcements will come. Up to you if that's a good thing or a bad thing; I usually try to take out the camp without them calling for help, then set up an ambush, trigger the alarm, and kill anyone who shows up."

"That seems, uh, excessive."

"It's better to root them all out now than to deal with them popping up later."

"Maybe they'd have a chance to learn their lesson."

"These sorts usually don't."

"That's kinda sad."

She raises an eyebrow. "You're a strange girl."

"I got that a surprising amount for growing up an exile."

" - I've heard about that custom. It seems strange, especially to exile a child."

"Won't catch me defending it."

"Why are you helping the Nora?"

"Because they need help."

"Huh."

"You'll help even people who've hurt you?"

"It wasn't- literally everyone. All the Nora."

"Still makes you more decent than most people I've met."

"Well, if most of the people you meet are bandits..."

"I don't talk much to the bandits!"

"Fair enough."

"Though, speaking of the bandits..."

"Right, I guess we should do something about them."

"I do wanna disable the alarm. So maybe let's get a bit closer and take out one of the watchtowers."

"Roger that."

Time to be Little Miss Sneaky Aloy.

Nil is exceptionally sneaky - 

And exceptionally good at killing people quietly. 

She's clearly got lots of practice. Killing people isn't something Aloy's used to, but it's not that much different from hunting machines, at least with a bow and arrow.

Once they get a vantage on the watchtower, she'll use her Focus to identify the alarm system and then shoot a hole in the gas bladder. Then... work from the outside in, she guesses.