Here's my experience. The water pump housing on my 6.0 ripped apart. I had USAA. I called them and all they found were tow companies that would only tow "IF" the camper was removed from the dually. Here's what three tow companies told me. "They don't want the liability of towing the truck and camper as they've had to many rear jacks contact the ground and cause major damage." I get it.
Plus, read your tow agreement. Most of them will "only" tow to the nearest repair shop (mileage limited). So beware if you've got the house strapped to the bed of the truck it's most likely gonna have to come off...(where/when/how really depends on the location, the condition of the truck, and where you can put the house).