Unfortunately we didn't meet anyone along our return home, but we did 1490 miles in two days. When we left Spearfish we set all the clocks to eastern time and drove from 6:00 AM eastern (when we were actually heading east on I-90), to 6:30 PM. The following morning we departed at 6:00 from just north of KC, MO to arrive in Knoxville at 7:30.
The Pro Driver says the mileage from Knoxville TN to Jamestown NY to Spearfish SD to Knoxville TN is 7.31 MPG towing the Hummer at just over 62 MPH.
We had a lot of fun and the frosting on the cake was when Jim announced he was buying the King's Liberty.