I looked at dates from April into June and saw little if any availability at properities close to IAD and did not see much of anything. Usually the AAA were within a few dollars of the pre-paid rates, so that is what I usually go with to allow for cancellation. I would use a 48 hour sale rate if any showed up, but as I said I did not really see many. I did see a few weekends in June at HP Dulles North, but the rates were not low enough for me to switch from AAA. In previous years I used to get $58 rates at the HP's around Dulles, or $67 rates at the Hyatt Dulles, or Fair Oaks.