We will be in DC for 2 full days as part of a family vacation. (Actually a day and half since we plan to drive to King of Prussia). Traveling with a 90 year old, a 67 year old with steel plates in her leg from a car accident and a partially handicapped person who uses a cane to walk. So obviously walking long distances will be out of the question. From reading, it seems there's basically no parking by the national mall, where is the closest place we can park? Price isn't really a concern for that aspect. Will it be walk-able from the parking place to the mall itself or would we still need to catch a train/other transportation. There are 7 of us total. What are some of the must do things at the mall and the surrounding areas. We're not big on museums so besides the air and space one, we'll basically skip the rest.