Young Goodman Brown: Questions & Observations

1. Young Goodman Brown left for Salem, What was his true reason for this? Was he expecting what happened that night?
2. Goodman Brown questions if what happened to him was just a nightmare from passing out on the road. I believe it was, because while he was saying goodbye to Faith, she insisted that he'd stay the night. If it was a plan to have him at the meeting, then why did she want him to spend the night with her?
3. At the end, everyone is acting like their normal self, as if nothing happened the night before. If those events really did happen to Goodman, then these people are living a double life. Could this story be telling us that not everyone is what they seem?