I think you may want to go look at your door jamb and see what it says your payload is.
This thread here explains all the math.
The first thing you need to do is decide which camp you fall in. The best camp to be in is to own neither the truck or the camper. This allows you to research and keep feelings out of your decision. This allows you to easily sit back and learn the process. The next camp is owning the truck or...
5thgenrams.com
Any specific questions after you read that...let me know.
Report back with your door jamb payload and i will calculate the math for ya.