Here's the summary of the costs for our 2007 trip to Virginia:
Total miles traveled: ~1680
Fuel - least expensive $3.04/gallon, Sheetz, Staunton, VA
- most expensive $3.33/gallon, Shell, Lenhartsville, PA
We stayed at the same location for the entire trip, so no high/low on lodging. MPG seems to be around 25mpg, decent for the spirited driving on this trip.
I have accounted the food costs a little differently than in the past; this new accounting should give more accurate figures (I am now including pre-trip purchases, in the past I haven't always done that).