Of a Truck/Camper(that with kitchen/bath) combo with high MPGs. Now, I'm assuming it's going to be diesel, but I'm also curious what one can get on the half-ton campers.
A Class B diesel van will get the best mileage. Most truck campers fight wind resistance reducing the vehicle mileage. I get 10-11 mpg hauling my Arctic Fox on a Ford F-250 or Ram 5500 diesel and loose another mile when also towing my trailer.