Hi, Deborah!
Great question!
While the current
special offers at Walt Disney World apply savings on reservations for Spring travel, you'll see offers for Fall in the coming months.
However, if you don't want to wait or take a chance that you don't get a reservation with one of those specials at the resort of your choosing, then I suggest that you go ahead and book your reservation at this time. You'll have the dates and package that you want, but can still keep an eye on Walt Disney World's website for future specials. I highly recommend that you book directly through Walt Disney World, as their cancellation policy is so flexible.
If something comes along that fits within your travel dates, and offers you savings or free dining, you can go ahead and book that new reservation first; then have that same WDW Cast Member cancel your original reservation. As long as you cancel at least six days prior to arrival, there is no penalty for the cancellation. Thus, you'll be credited back everything you've paid toward the first reservation, and will be charged for the new one. (This is one of the many reasons that I prefer to book my WDW vacations directly through Disney.)
Send more questions as you think of htem, Deborah! We love to help!