The subject of weights is often discussed and equally often contested. Good approximation of camper weight is camper sticker plus weight of options, plus 1,000 pounds.
The whole area of weight is fraught with difficulty because camper manufacturers, in my opinion, do everything they can to sound lighter than we are and truck manufacturers try to make the trucks sound more capable than they are. Only real way to be sure is to weigh things.
When it comes to weight, some folks go by their ratings, some go by whatever measure they decide is he most important.
However, having RVed in every possible way, truck campers are still one of my favorites.