I still think the nicest deal for DCA parking is at nearby 5 min away SUNPARK, on about 28th street beside the Hyatt. Approx 7 dolla/day and cheaper for longer stays. Your car is safe too. Fast pickup at your car and usually 5-10 min after you call upon return. Some info and coupons at
www.sunpark.com
I have never used any of the DCA lparking ots after discovering these nice efficient guys.
MisterNice