I would hold out. Even if you have to buy 1 annual pass to get a discount, if no codes are available, it would still be cheaper then the dream maker package. If cheap is what you want, then you don't want to be paying for park passes if you are not going to be in all the parks from the minute you check in to the night of check out and in between! It depends on how you plan on vacationing. For us we go to the parks at our leisure, take our time and spend a few days not in the parks just enjoying the resort.
I know it's hard to wait but it should be well worth it. Also, last year they offered a similar package in Nov. By Aug. you should have a few options. I'd wait till then.