Anybody refused to be loaded because a dog in the truck?

Everything you said is correct except for the sleeper berth being considered a domicile. The precedent had been set with many court rulings on RVs. When parked at a long term camp it's protected just like a home is. But when traveling the roads or short term parking at a rest area/hotel/etc it is considered the same as a regular car in context of protection from search and other constitutional rights.