[SuziQz]

We’ve always used it but book as a package hotel/Eurostar via Magic Breaks. It’s brilliant being able to hand in the luggage at the station when you get off the train and heading straight to the parks. Likewise leaving the luggage at the hotel on the way back and picking it up again at the station. (Don’t leave it too close to boarding time, it takes a while to get through passport control etc)

If you booked the hotel directly with Disney then give them a ring and see if you can add it.