I haven't been there before, but Little Stony Man sounds pretty cool. The PMC has a great guide.
The trailhead parking is about 1:45 from the East Falls Church Metro station. There's a $15/vehicle entrance fee for Skyline Drive, so carpooling is recommended. (Follow the driving directions in the guide I've linked to above.)
Meet at the East Falls Church Metro station at 8:30am and/or at the trailhead parking lot at 10:15am.
As usual, bring food, water, climbing shoes, harness, and helmet (even a bike helmet is better than no helmet). If you can give people a ride from the metro station, mention how many people you can take.