Hey guys, I was looking for a hotel in the washington area and notice there are 30 some properties. As a Plat member, which would offer the most bang for the points?

Our plan, land around 7pm in DCA view the sights and sounds before our flight at 5pm out of IAD. Perhalps a hotel that offers free parking to plats as we will grab a rental; mostly to keep our luggage safe in the day time. Unless we can get a hotel near the sighs and sounds that offers free shuttle service to dca and iad (or quick/fast public transit) and late check-out (min 2pm)

So any hotels fitting this description?