Staying off topic {misdemeanor thread drift}...
Come on now Phil, Texas panhandle in August, seriously? :S
We took the car because we had a limited window for the trip and RV parking in our friend's subdivision is prohibited. To take the C we would have been cruising at 63 to 65 {vs a steady 80 to 83} adding at least a day to our travel time, burning 3 times the fuel and then would have had to pay for a site in an RV park across town instead of staying with our hosts.
Nice pic but I defy you to find anywhere in west Texas {between El Paso and San Antonio} that looks like that shot. I-10 between El Paso and SA is a great road and you can really make good time {in a car} but not much to see.
We average 10,000 miles a year in our coach {often much more} and some trips simply make more sense without it.
:B