Depends on how flexible your schedule is

Small airport, usually quick to get out as others alluded. As to which transportation to take to get to the hotel, it'd depend on if you have a meeting at the hotel, say, 10am that you must be there for. If so, I think your safest bet would be taking Metro. Blue line takes you from airport straight to Metro Center. Hotel is about a block away. Compared to taxi, this might be more reliable.

I learned my lesson the hard way a decade ago while living in Old Town, Alexandria VA, to never count on DC local traffic :-)