I agree with Fredericksburg. It is a beautiful area.
Something else you might want to consider is KOA Kamping Kabins for your driving trip.
I recently did this. Two cabins for the 5 of you are less than any hotel room in Virginia or Maryland.
We stayed in three different KOA places just last month.
Each Kabin has a double bed and a set of bunk beds. They have great air conditioning and some places even provide cable. You have to bring your own linens and provide a tv and use a public shower facility, but we really enjoyed them.
We also did a two-day tour of Washington, DC. We drove in to the nearest Metro stop and parked the car.
Details on the Metro. The All-Day tourist ticket is 6.50 after 9:30 in the morning. We were there during the week so don't know about weekends. At the Metro parking lots you must purchase a Smart Card to pay for parking when you exit.
As far as touring the monuments. We used a company called Tourmobile. (
www.tourmobile.com) It was $30.00 for a two-day ticket. This is a bus (several buses actually) that make a continous loop of all of the monuments, the Smithsonian, and Arlington Cemetary. It stops at each of the points of interest and you have unlimited on and off of the buses. It runs from 9:30 am till about 4:30 pm. (Arlington Tours continue until 6:30)
On the first day we started at Union Station and got on the bus and started our tour. We did American History Museum, Holocaust Museum, Washington Monument, Jefferson Memorial, Lincoln Memorial, then we went to Arlington Cemetary. You get off at Arlington Cemetary and get on a separate trolley that goes through the cemetary and stops at the Kennedy Tombs, the Tomb of the Unknown, and also a house of the original owner (forgot his name). We were at the 5:30 pm Changing of the Guards, so we also got to see them lower the colors. We then hopped back on the Metro and went to dinner at Pentagon City Mall, then went back to our car.
The next morning we took the Metro to Arlington and started from there and saw Lincoln Memorial, WWII memorial, Vietnam Memorial, Korean Memorial, Air and Space Museum, Museum of Natural History. We ended back at Union Station, had dinner there, then took the metro back to our car.
The only difficulty we had with the tour and this is worth mentioning. At one stop we had to wait for three buses to come by before we could get back on. It was extremely hot and some folks were not getting off. Just staying on and listening to the narrator. This was on a Friday, so hot weekends may be even more of a problem.
The other thing to mention is that to actually get INTO some of the exhibits you need a ticket. They are free, but are distributed about 7am. For example to go INTO the Washington Monument there are tickets. The interior tour of Engraving and Printing there are tickets. To get a tour of the White House you need to contact your Congressman or Senator ahead of time and undergo a Security Investigation.
Another thing you might want to do is inbetween Fredericksburg and Washington (Maryland) take US 301 instead of I-95. It is a great view over the Chesapeake River and just after you cross the river (about 4 miles), there is a great restaurant called Captain Billy's Crab House. It is right on the river and is the best food!!
I hope this helps.
Carol