Just to further clarify, anyone can make ADRs 180 days out. You don't need to provide any reservation info to get an ADR (although they will probably ask for your resort name, you don't have to give one).
The current dining perk for on-site guests is the 180+10. This means that if you have a on-site resort reservation, you can book all your days of dining (up to 10) at 180 days out from your first night on property (so your last adr could actually be 190 days out). This means that you don't have to call back each day to get the next night booked (assuming you book each ressie at exactly 180 days prior). You can book them all at once, although they do hold some seats at the most popular places for exactly 180, so if something is booked earlier, it is worth trying again at 180 days.
I hope that helps a little and didn't make things more murky! JJ