You can book for 2017 now over the phone at the current year's rates which will adjust once new rates are set (usually during the summer). You don't "lock in" the prior year's rates. This is for room-only reservations.
Online booking for the next year becomes available once the new rates are set during summer. That's when packages can first be booked as well.
I already have a Fort Wilderness reservation for January 2017.
Bama Ed
PS - I think the farthest out you can book is 499 days.
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