On a 3000 mile trip our average was ( 13.4169 miles/gallon(US)). On the hwy. I drive it at 55 mph whether it likes it or not, that's comfortable for us. The Vanguard is 23 ft. nose to tail similar to the Kodiak by the same manufacturer.
As to being a gas guzzler, I guess it's a matter of opinion but one thing definite is the performance is awesome in a smaller rig.
Now for comparison, a friend has a Pleasure Way TD, Ford powered V8 "B". A smaller engine in a lighter vehicle, however his MPG is less than the economy I get.
A Chinook is a nice Rig Chinook is out of buisness. So your talking about a unit that is not built anymore. just because the NADA book says one figure dont mean thats what you can get it for, Its called Supply & Demand. Someone may want the unit more than you and pay a bit more for it.
"That PleasureWay V8 should get 14-16mpg. Mine do."
Maybe he didn't do the calculation right, mine seems to get continuous average of 13 and for it's weight that's excellent.
One question though! do you have the 4.6 lt. or the 5.4 lt. V8?