By the way, I know you said you aren't changing out your truck, but for one of these monster TC's you are talking about......in the long run you might be better off buying a 550/5500 even used. Not only can you carry the camper easily, but could add the flatbed and boxes too and have a much better setup (in my humble opinion.) My suspension alone cost 6k or more (now that I think about all the trips back to the shop to get it right I'm sure it was at least 6) a 2006 or so Kodiak for $15-20K sounds like potentially a better spend of money. I love driving my Kodiak (or an F550 for that matter) despite the size/weight. It turns sharper than your truck does (wide front wheels and sharp cut) too! You'll also have better towing/braking etc. even with carrying a camper too.
Had to add that in despite your comments.....sorry! ;)