For the UK people we were not allowed to check in without the full address of our hotel including the zip the ususal

Wilderness lodge
WDW
Orlando
Florida

was rejected

the rather helpful checkin lady said we should call directory enquiries

luckily I had the wdw travel company phone number on me and had an interesting conversation with the lady there over the speaker announcements in Gatwick - if I were you if you are staying on property I would get the full address before you go.

Also ESTA was not working at all when we arrived.