My daughter and I are cycling from Baltimore to Charlottesville, via Annapolis, DC, and the Skyline Drive. Any suggestions on the Annapolis to DC leg?

Bill

Bike Washington has a route.
http://bikewashington.org/routes/greentobay/index.htm
I've never tried it, but they are usually reliable.

added
You can combine it with this one from Greenbelt to DC
http://bikewashington.org/routes/dc2balt/index.htm

I have ridden the Bowie to Greenbelt section, thru the USDA grounds. That part is a nice ride.