Man,I am glad they didn't have the internet back when I started into truck campers..:B..From 8ft campers on 1/2 ton trucks to 8-10ft on 3/4 ton trucks,I never weighed a one,never looked at a door sticker for payload and never wondered if it would work,I just made it work..
Never a broken axle/bearing or anything related to weight in the back..Just put the TC on and added springs if needed and the coil helper springs were like $15 back then/now $25..One set of Helwig helper springs only because of a heavy 35ft Fifth Wheel on a 3/4 Ford we lived in for a while.
The internet has changed truck camping,that's cool..I weighed my first TC(My currant one) because of the internet and we have a grain scale a block away and I miss those guys..:)..I still wouldn't change a thing if the weights said I was a criminal ready to run-over anything in my path...I drive accordingly..
A normal truck camper on a normal HD pickup truck(1/2 or 3/4 ton or above),just works and it doesn't have to be expensive either, unless of course,you read the internet...
To the op...You can listen to the dealer/someone on the internet or you can use just good common sense and enjoy a pickup with a truck camper on it....Your choice as it should be.