Okay, I'm going off memory here .....
North of Lorton is the Springfield interchange area, where I-95, I-495, and I-395 all meet. There's a good size mall there and several hotels of differing quality. Downside is the traffic. That interchange is in the midst of construction and constant HEAVY traffic. IIRC, there's a Days Inn that's so-so and a Holiday Inn that's pretty nice but I'm not sure of the $$.
South of Lorton is Dale City/Woodbridge. The Potomac Mills mall is there, along with many other shopping centers. There are several hotels there that might be a bit more reasonable.
Both of these areas are probably 10 miles from the station, though. Woodbridge would be my choice -- pretty nice area and plenty of restaurants to choose from -- but I don't know what might be closer to the station.