I won a priceline bid for 2 nights at the Westin DC City Center. Was happy until I read that parking was valet-only @ $40/night. What are my other options? I can see paying $20/night but not $40.

1) What would I expect to pay in that area for self-parking in a garage?

2) Since there's a Metro station 2 blocks away, can I park at one of the larger Metro stations? I've heard they offer free parking on the weekends; although I don't know what qualifies as a weekend. We're checking in around 4 or 5pm on a Friday and departing on a Sunday. Can you park overnight at Metro stations? If so, which ones?

Thanks very much.