Regardless of where you are staying you can make your ADRs starting at the 180-day mark. For those people that are staying on property, you can make the ADRs for the first 10-days of your trip at that point. Otherwise, you have to come back each day to make the ADRs for the next day.
Let's say you have a trip that starts on Jan 1, 2012 and ends on Jan 5, 2012. Regardless of where you are staying, you could make ADRs for Jan 1 today. If you are staying on property, then you can also make the ADRS for the rest of your trip. If you were staying off-property, then you need to come back tomorrow and make the ADRs for Jan 2.
You can make the ADRs online or over the phone. The phone lines open at 7 am and the online opens at 6 am, all time are eastern.