I don't really know what 180+10 means so I did a search and came up with the post in quotes below. But I have another question, why do you need an extra 10 days when you can call 180 days out - wouldn't you make all your reservations on the 180 day mark? Sorry that I'm confused, story of my life "If you are staying at a Disney hotel you have the ability to make reservations 180 days out plus an additional 10 days so that you can book them all at once. The possibility is there that the day you want CRT might be full, but just be flexible to change to another day during your stay if need be. I would not worry too much about it, if you are booked on property just make sure you call as soon as you are able to."