I carry my camper with a one ton dually for the reasons mentioned about being able to also use it as my regular daily driver, I don't need a big truck often enough and it wouid sit around rotting and drying up. But I do drive big-trucks all the time, hauling a horse trailer, driving crane truck, etc. and let me tell you, you might think a Ram or Duramax or Powerstroke makes easy and light work of towing an RV, but wait 'til you see what a C15 Caterpillar can do.
If I were going to drive a whole lot with a really big 5th wheel, I'd do it in a Peterbilt 379 with a C15.
Pickup trucks are a JOKE in comparison. And - you can buy a clean nice used 379 for less than a new diesel dually and it'll still have more miles left in it than the new pickup has.
However, as was also stated, big trucks aren't for everyone. If you're not familiar with them and/or work with them, it's biting off a pretty big morsel to chew.
For occasional use, I agree... not worth it, use your one ton. But it's a whole different world in a real truck.
