You camper has to be a "basement model" that the dinette is not an integral part of the camper in order for it to be practical to remove and replace with seating.
On mine, the dinette is part of the "wing" on the passenger side, for example. If I tore it out there would be a large gaping hole in the side of the camper, and it would probably collapse, for example. It's the most God-awful place to sit that man has ever created.