Hello Isabela, and let me assure you- when it comes to planning a Walt Disney World Resort vacation there is no such thing as a silly question!
The "kiss goodnight" is a tradition many visitors to the Magic Kingdom miss, but it is worth the wait! My friend Moms Panelist Bob A. gave a great description of this nightly event
here. While I can't guarantee that it will be the ferry that returns you to the Transportation and Ticket Center to retrieve your car, I can assure you that you won't have to spend the night at the Magic Kingdom... although, I wish that was an option! Whether it is via monorail, ferry, or bus the transportation to parking runs at least one hour past park closing... and in my experience, quite a bit longer. So never fear! Enjoy Cinderella Castle's kiss goodnight.
Don't hesitate to come back to the Disney World Moms Panel with any questions you might have. We love to help!
See ya real soon!
Anne