We've always gotten some sort of a discount, so I'd still keep checking around.
For my family, we've pretty much decided that we'd prefer now to stay offsite at a Marriott condo (Marriott because we are owners, not in Florida, and DH is platinum so we get night credits to keep his status). We've gotten getaways from Interval International that are amazing, like $350 for a week in a really nice 2 bedroom condo.
Also we've stayed a few times free at the Swan and Dolphin, using our Starpoints.
Got
free dining once (along with a nice room discount) but it was more food than we normally eat (regular plan) and all of us sharing one room is too tight now!
I'd check with mousesavers and subscribe to her email updates - check often! Also call Disney and see if there are any unadvertised codes linked to your family. Order the vacation planning DVD online - to get into their system - plus it's fun for young kids to watch! Gets them excited!
I'd also figure out your budget and stick to that. Compare onsite vs offsite (onsite I never needed nor wanted a rental car, so that is a plus, makes the vacation a bit more relaxing, but offsite we enjoy the freedom of a large condo and eating nearby or cooking so saves money.... you see there are arguments for both choices!!).
Good luck!