Fairfax County offers day trips to CT
http://www.fairfaxcounty.gov/parks/rec/classes/trips/
The good thing is I doubt they will cancel on you and they just service Fairfax and dont drag the trip out by stopping in PG or elsewhere.
8/14/2011
Hollywood Casino at Charles Town Races
Includes motor coach, buffet brunch and racing form. Enjoy the slots, the races, and a day at the track! Bus pick-up/return schedule: Lee District RECenter- depart 9am, return 7pm; Mason Government Center- depart 9:30am, return 6:30pm; Fair Oaks Mall- depart 10am, return 6pm. Trip cancellation deadline: September 26, 2011.
Location: Tours
Start Time/Day: 9am Sun
Start Date: 8/14/2011