You and otheres may know this already, but others may not.
when arriving at the main entrance of your resort , the gaurd has your name on a sheet of people ready to check in that day.
Once checked in, you will get a flyer to place on your dashboard stating what resort you are staying at and when you checked in / and when you will check out.
You can go to any resort you want....the gaurd will look at your flyer on the dashboard and then politely wave, smile, and tell you to have a nice day.
OR you can use your room key by an automatice gate...but not sure if the room key works at other resorts if you are not staying at that particular resort.
Its a nice security feature.