Hello Heather, and welcome back to planDisney!
I am the queen of one-night stays because, like you, I will reserve a stay for a certain number of days and then, closer to my arrival date, will decide that I would like to stay an additional night at the start or the end of my stay. You will be happy to know that, pending availability, you can certainly reserve a one-night stay at one of the many
Walt Disney World resorts. If it is not showing available, it could be that a specific resort is sold out for that timeframe. If you continue to check with no success, try taking a look at one of the
Disney Springs Resort Area Hotels. I have been able to get a night here and there when my chosen resort was booked.
Do not forget to make your theme park reservations using the Disney Parks Pass System to ensure you can enter and have the best time at your chosen theme parks.
Please return should you have additional questions; we are here to help.
Have a magical time during your stay!
Raquel