They were taking turns to watch while the other was keeping an eye to threats from the wilderness. The driver was keeping an eye on you being the most tired, he missed o blatantly choose to ignore your talking.
He was seated in a position in which he could've easily rest his eyes without falling, so the spell worked out great and you can be certain that your spell could still affect another guard (but as they're sleeping in a tent is impossible to know if it was the other driver or the one that traveled with you)
So now that only one is awake, cecilia casts charm person imideatly on the other guard. He has to succeed on a dc 13 wisdom save or be charmed for 1 hour
The guard turns to the prisoners as if he would've been interest in someone from the group, he can remember the voice of her and he can only think of it as the most beautiful sound he's ever heard 8 ...
Cecilia! You know I can't do that...but a good friend like you who's never wronged me in any way, shouldn't be chained like a dog! - and he quickly kneels to help Cecilia and finally open the the lock and remove every chain that was restraining her.
Come, help me watch over the wilderness so no creature can take us by surprise us while we rest.
As soon as the guard is asleep and before the guard has come over Nim stealths to the chest with belongings (Stealth 28) and try to open it. If it is unlocked he takes all of his items back, and has a look at what else is in there but leaves it for the others.
I'm afraid I can't, Rolf will keep an eye on them, besides, I don't need any of them to keep you safe! - the guard attempts to grab Cecilia's hand with the intention to guide her where he was watching over the surrounding areas of the camp.
cecilia whispers to xolan: "put him to sleep!" she then turns back to the guard: "Ok i'll help you keep watch. I'll be with you in a second." she hopes that the guard will return to the camp. when he is gone she whispers to xolan: "put him to sleep and i will look for the key."
The guard continues alone but kind of waits on Cecilia before going all the way to the sort of guarding post that he created a couple of hours after they set camp. (While the prisoners get to eat, drink water, etc.)
Larry will say to Cicilia "Keep him distracted is fine...let us get our chains off and then we can handle these fools easier"
Larry will nod Nim over and tap Nim with Guidance as he returns and before he leaves...holding up his manacles to get them removed. Assuming Nim is to free all of them he will continue to tap him with Guidance as he picks the locks on all manacles.
After being freed Yuno will go grab her stuff. She won't put on her armor because it takes 1 minute to do so and the guards would probably wake up before then. Yuno suggests, "So should we go over and kill these saps." She smiles and you can tell she's eager to get some blood on her.