You might be shooting yourselves in the feet by trying to book this early.
CO may not be kidding you about *no* seats on *any* flights at this time, next year... because such seats may not be inventoried as of yet.
Furthermore, next year there might be a fare sale which makes paying for the tickets far more worth it in the mileage gained than from their expenditure for reward travel.
Likewise, there might be a promotion for reward travel at significantly-reduced mileage levels, such as what happened a few weeks ago.
Any particular reason why there is such a hurry to book *now* for next year? As you can see, it's not giving you any advantages as far as seat availability...