T.B.
Hi,
Our family is doing our first onsite trip to WDW this May, after a bunch of off-site ones. We're planning on doing the DDP so I don't have any advice about it yet. One thing I would recommend would be to go to a couple of websites for information about places to stay onsite. My favorites are: www.wdwinfo.com, www.allearsnet.com,www.disboards.com and www.mousesavers.com.
One thing about AAA. I think that you could get good discounts, but it is REALLY important that you get a travel agent that knows about Disney. I have not had good experiences with the Michigan Avenue or the Lincoln Park location. I would suggest the Evanston AAA office. You don't have to live close to them because you do most of the reservation stuff over the telephone and e-mail.
Hope this helps.