The Embassy Suites (22nd and N) is convenient to Foggy Bottom, Georgetown, and Dupont Circle, but it is located in the West End area, not Georgetown. I walk past the hotel every day and can confirm that it is very popular with families. It could be a good choice if you decide not to take a chance with Priceline. You might reserve there now and cancel without penalty later if you get lucky with Priceline closer to your travel dates.

What do you think of the following hotels with the following rates for my Priceline backup plan? Pros? Cons?

Embassy Inn on 16th St. NW $115
Windsor Park Hotel Kalorama Rd. NW $95
Hilton Garden Inn $143

Every girl is different! But mine are at that age and would be bored after an hour at MtVernon.
Also, Williamsburg is lovely, but one day of the historic part would be enough. If Busch gardens is open, that is a great day in Williamsburg too.
Just my two cents.

Webbah:
Hilton Garden Inn is at Franklin Sq (14th and I). That's near Metro stations and in walking distance of many sites you'll want to visit (eg Smithsonian museums, White House), but in a business district that doesn't see much activity at night.

Embassy Inn on 16th near Q is in the Dupont Circle area, with a lively restaurant strip nearby on 17th. Metro is 4 blocks away at 20th.

Windsor Park (Kalorama and Conn.) is in a residential area a bit off the tourist track but its location should be fine if you don't mind walking 6 blocks to Metro and restaurants on Conn Ave near Dupont or Woodley stations.

Both Hilton Garden and Embassy Inn are in the central taxi zone that includes all the major sites, Windsor Park is in the next zone.

Can't help you with the interiors, but the prices you quote reflect the hotels' distance from the White House, I guess.

Regarding your 3 backup hotels, they are all 3 perfectly fine choices. Kayd described the locations pretty well. I would rank them as follows:

1st - Embassy Inn on 16th St.

2nd - Hilton Garden Inn

3rd - Windsor Park Hotel Kalorama Rd.

Although I live in the DC area, I've stayed in the Garden Inn -- it was our office backup when a huge snowstorm hit a couple of years ago.

It was new, very comfortable and -- although the area is mostly business with little nightlife -- there are many advantages.

It's close to Metro -- right across the street. There are a variety of restaurants and a CVS pharmacy close. If your child needs a fast-food fix, there are McDonald's, Quiznos and Subways all within a block or two. There's also the best bargain in downtown -- the Old Ebbitt's Grill Express. (Check out the daily pasta special.) Cosi is nearby and a great place for a quick meal. A couple blocks away, you'll find Red Sage, which is kid friendly in the upstairs room, and a Corner Bakery.

If you need a cab, most of the tourist sites are in the same zone (DC cabs are priced by zone rather than meters.) Plus it's not a bad walk to the Mall or White House from the hotel.

I'd also look at the JW Marriott, which is several blocks closer to most attractions.