Yeah, and most of those come with an on-board generator to power all of that. There are very, VERY few high-end TTs and 5-ers that have electric furnace/range without at least the option of an on-board generator. There are exactly zero entry- to mid-range ones that do.
It sounds like OP wants to use their truck as a generator while dry-camping, and that's a highly inefficient way to do it. The best thing to do is just buy a small generator that will run what you want and bring it with.
On a side note, I once read an article (years ago, mind you) called the 'Million Mile Extension Cord' where a guy did what OP wanted to do. In order to get enough current to run the inverter and actually power anything, he had to run either size 2 or 0 wire (I don't recall which) and buy industrial-rated quick-connectors. He bragged that he could leave a crock pot on and let it cook while he drove all day. I never could figure out why you'd want to do that, since this was before crock pots had latching tops, so he would have entered his trailer to an absolute mess of dinner everywhere.
The simple fact of the matter is that, even if you have dual batteries in your RV, today's pickups and SUVs have no problems charging the batteries while you drive, even if you leave your 12vdc appliances running.
