The likelihood of getting in without an AR (gosh, that's hard to type!) is slim to none - esp in summer months which is when you're visiting. You are more than welcome to stop by the podium and inquire, but it's not likely.
However, don't give up! Call each and everyday just to check, be very flexible with times (lunch or dinner, even times you wouldn't normally eat at - you can work around it for one day!), and even call once at WDW.