When we were at Disney back in 2019, the DME departure information was left under our door the last night we were there. There was no need to call anyone. You can always ask at the front desk since one of the families we were traveling with packed their paperwork in their luggage and needed an extra copy to show the bus driver when boarding the bus. Pickup time was about 3 hrs before flight departure, but not sure if they are currently allowing more time for any number of reasons.