What's been said before is true, but I booked a week in January last year the Wednesday before my Sunday arrival date and had no problem getting my view. I actually got upgraded from a studio to a 1BR OV, 6th floor, pool side, closest to the ocean. This year, around the April/May timeframe, I booked two studios for the last week of September and didn't have a problem making the reservation. We'll see what units I get, but from what I hear the resort will be close to its lowest occupancy when we go there and I am not concerned about the room. I've also never reserved at the first minute the reservation lines open, just some time in the 12-8 month window. So far I've gotten a good room all five or six times I've been there, even though I usually go July 4th week or a week around it. The January trip above and the upcoming September trip are the only off-season trips I've made.
If you are flexible about the particular week you will arrive and you are going outside of the peak holiday seasons you will probably be OK. If you want to go during the summer months, Thanksgiving, Christmas time, Spring Break, etc, then you might have a problem even getting a room 6 months out.