I use my Chevy crew cab dually as a work truck so I do drive it just about every day. i probably average about 100 miles a day to and from work sites. I have an aluminum flatbed on the truck with under and over bed tool boxes. Loaded for work it weighs about 9,000 pounds. I also used it to haul my 11' TC on family vacations. I would clean out the bed between the boxes and slide under the camper. I did try to personally pay for the fuel I used on camping trips but I still let my business handle all the maintenance.