I hadn't actually thought of that, but the PP is right - they didn't ask us for our names at MK when we had early ADR's at CRT. There is a special line marked "character breakfast" at the gate that you will need to wait in. Once they let you in you are free to roam about Main Street and of course you'll need to give your name at the entrance to CRT.
The next day at AK we had an early ADR at Tusker House and they most certainly did ask our names and crossed us off.