there are nearly always trolleys outside the Hilton, right next to the bridge.
Once, about 18 months ago, I went for breakfast in the very nice lounge early one morning, and left my jacket hanging on the inside of my room door (so I wouldn't forget it). This managed to ensure that I locked myself out of my room, and as it was at 07.30 in the morning (and my flight to Basel at 8.30) I had also managed to do it at the same time as the break for the maintenance man (who was back at 08.00)
Lovely manager lady managed to persuade him to come back and break in, and then the hotel got me, luggage and all, across the bridge on the 'beep beep' thing they have for moving less able people about. Great fun, and I made my flight!