Surrounded.
It was the middle of the night, and Nux's wives were currently resting inside a tent they had created using a cloth given by Aisha. Obviously, since Aisha was the one who gave it to them, it was not a normal piece of cloth, it had the ability to cast a barrier around itself, the barrier that casts an illusion on others that the cloth and everything inside the cloth is not present.
Yes, this piece of cloth allowed Nux and his wives to remain concealed while living inside the middle of the Forest full of Dangerous Star Beasts.
Of course, there were several restrictions as well.
The moment the piece of cloth moves, the barrier will disappear and will only be activated 10 seconds later.
If the person already knows there is a tent here with 100% assurity, the barrier's illusion will not work.
A person with a strong mind will not be affected by the Illusion.