No, Miss Maudie does not believe the rumors.
Answer: The last word of Keesh was "It is not for a boy to know about witches, and I know nothing about witches. I only have means whereby I may kill an ice-bear with ease, that's all. It would be headcraft, not witchcraft".
In "The Story of Keesh" by Jack London, the people of the tribe did not believe that Keesh had hunt a large polar bear by himself, so they accused him and his mother of witchcraft. It required dignity and manhood for him to defend himself and speak against the elder hunters who disliked him.
Use your brain that god blessed you with I know your smart.
The setting will most likely affect the plot in the way that the power failure will hinder the movie and video games as the girl, her parents and guests are not done yet with the cake and food at the table and as read in the story, they would afterwards watch a new-release movie, and later they girls would play video games until time to go sleep, but now with the power cut they will not be able to do such things because there will not be power for the TV not for the console.