Call
DVCs can't be booked on cash at more than 7 months out
they did the same with international bookings when they opened in april for 2017.
No online booking, and that's a prebooking until the rooms are in the system (11 months for owners on points at home resort, 7 months otherwise) or at least that's how they do this year at the international CRO. No reason to think the US CRO works different.