If I booked a room with my card can someone else go up there and lie there way into my room?

Glenn is correct!!

You reserve with your card, must have your card and ID to get your room key.

Nope

No

You get wrist bands for the water park , they also serve as your dorm Room key and admissions into other services provided. Their wristband would have to be programs to unlock your door in order to get in your Room.

No ID is required at check in.