Every person in the room over the age of 3 will have their own plastic room key with their name on it. It is as valuable now as your entry ticket (and IS your entry ticket on some plans). For the early hours and for getting onto Disney transportation in the morning, they pretty much were only wanting to see A valid hotel ticket or (in the case of transportation privileges) a park pass. However, to get the evening writs bands, they checked every person's hotel card. People were trying every trick they could think of to get a wristband or to get on a ride without one, but I did not see anyone get away with it.
-f