You can make ADR's 180 days out. If you are staying onsite, at the 180 day mark from the start of your stay, you can make ADR's for your entire stay (up to 10 extra days). Not all ADR's are put into the pool for the extended booking, though, so if you want something very popular, you may still need to call daily.
I'm sure someone will correct me if I'm wrong.
Beth