Only you know what is right for your family, but I will throw a couple of thoughts out there. One is if you go this year, your youngest will be free, so that would be a huge savings. Not only will he enter the parks for free, he will also eat for free. You also may be able to get
free dining during the time frame that you are going. Not sure if its available for the AOA rooms, but its something to consider. You would lose any room discount, so you would have to figure if a room discount is more of a bargain than the free dining.