Hello from Litchfield County, Katherine!
You must be so excited that you will be at Walt Disney World very soon! I hope you have lots of fun things planned, including attending
Mickey's Not-So-Scary Halloween Party and visiting the
EPCOT International Food & Wine Festival! I am unable to tell by your question if you booked a vacation package or a room-only reservation.
If you booked a vacation package please refer to the
terms and conditions (subject to change) as it includes statements such as "
changes made 30 days or less prior to guest arrival are also subject to a change fee of $50 per package plus any change fees assessed by third party hotels or other suppliers" and "
No refunds will be made for early departure from hotel and for unused or partially used admission tickets, options or features, including meals."
If you booked a room-only reservation, you have a little more flexibility as you are able to modify or cancel without penalty 5 days prior to arrival (also subject to change). I did speak to a cast member to ask about leaving a day early after you have already arrived for your vacation and they stated it would be best to work with the front desk for your particular circumstance.
Finally, I'd like to mention that if you end up leaving a day early, please make sure to cancel any reservations for dining or other experiences you may have for the time you will not be there as they will not automatically cancel.
I hope you find this information helpful, Katherine. Please contact planDisney again if we can assist you further.
Diane