Dang G-Dog..How could I argue with such logic...
The op is buying a Nothern Lite 10-2 that will weigh around 45-4600 pounds ready to camp(estimate)..He never mentioned pulling anything heavy that would require something more powerful than a modern gas engine with a modern transmission..
Maybe in the future a fifth wheel is in order,then a diesel makes sense but not with just a truck camper..JMHO owning a 460 ford that eats our hills with ease and still gets 11.3 MPG loaded from Missoula to Grangeville with the TC on via hiway 12 over Lolo pass and a couple others.