So, here's the (not so) exciting results:
The "In Out" times are places I stopped the car and turned off the engine for a period of time so this didn't contribute to the average speed calculation.
The section above the yellow line is the trip up and the area below is the trip back. The trip up consisted of about 2 hours of interstate, an hour of sitting stopped in traffic at various times and the rest was a combination of rural highway and small town speeds of 35 MPH or less. I did get trapped behind a few pokies on the two lane back roads so I lost a little economy when I had to leave them behind in a cloud of smoke. Not really trying to smoke them, it's just a byproduct of acceleration. The trip back was all interstate except for the first 30 minutes getting through town. I have EZ pass so there was no waiting at toll booths.