Hi there, Heather!
I already love your style! I am a firm believer that adding an extra day to any Disney Parks vacation is a fantastic plan!
When you arrive at
Disney's All-Star Movie Resort, your room may or may not be ready yet since the earliest time you can typically check in is 3:00 p.m. Eastern. I recommend packing a separate bag in your carry-on with swimsuits so you can leave your luggage with Bell Services and hop in the pool for a few hours during the heat of the day. By the time you're done swimming, your room should be available and you can call down to have your luggage brought up.
I think it would be a perfect time to head over to Downtown Disney for the evening. There are so many great shops with all different kinds of merchandise and there are some pretty awesome restaurants there as well. One of our favorites is
Cookes of Dublin. They serve fantastic fish and chips and the prices are pretty reasonable too! You don't even need a reservation and they have indoor and outdoor seating available.
How exciting that you're heading over to Disney's Polynesian Resort the following morning! Be sure to utilize Bell Services if you need help getting your luggage transferred. They're more than happy to get it delivered to your next Resort for you so that you can head straight to the Parks in the morning!
I sure hope this helps! Please let us know if we can help with any other questions you have!
Wishing you and your family a Pixie Dusted vacation!
~Jackie