I'll be traveling with my family to Washington DC for the first time this month. We're staying at the Gaylord National (National Spelling Bee).

The Gaylord apparently recommends Supershuttle when going between the hotel and DCA, but I'm not too wild about that choice. If you were in our shoes, would you go with Supershuttle, or cab it? Supposedly you can pay the cabbie with a credit card?

We're not planning to rent a car, either, because we expect to be at the hotel 90% of the time.

We made an appointment to tour the Capital Building, as well, and I just figured to cab it over there, even though there will be five of us. But if there is a better way, I'd appreciate any suggestions. Thanks in advance...