I ordered my F350 to carry the camper in my sig. I used the Ford online build tool for a dually F350 6.2 gas in the XLT package. I went with the 4.3 rear end, camper package, the factory spray in bedliner, and a few other options I wanted for comfort or convenience. After I spec'd out the truck I printed the final build and took it to my dealer. He went over each option and ordered the truck just as I wanted. Some trim levels will include or prevent certain options but in the XLT trim package I was able to get everything I wanted and avoid a lot of the fluff I didn't want or need. We have been very happy with outcome and with some stabiloads the truck works great. I went through the the same thing as you trying to find a truck on a dealer lot that had what I wanted and it was almost impossible without dropping down to the XL trim level. Hadn't ordered a vehicle since the 70's but it was easy and my truck was built within 30 days.