Got that trip in and we had a great time. I am definitely hooked on the diesel. The truck performed flawlessly and easily handled the winding, hilly 2 lane roads that we were on for at least 90% of the trip.
The mpg's weren't all that great on the trip to the campground, but were about what I expected considering the roads we were traveling. Starting the truck's calculator from a dead stop in my driveway the truck averaged 9.6 mpg's.
Overall....a total of about 150 miles with less than 40 miles driven without the tt hitched up the truck averaged 11.6 mpg's. Leaving the SP was mostly downhill off the hill we were camped on and the miles driving unhitched helped with the overall mpg's.
I'm afraid I can never go back to a gasser now!