I see the any weight you can fit in your bed crowd and don’t worry about it are alive and well. Things to consider if you take that advice. If you’re involved in a traffic collision and either the police or the insurance investigator decide to weigh your rig or what’s left of it and you’re over weight you will most likely be assessed some level of fault. You may even be criminally charged if death or injury occurs as you knew or should have known that you were overloaded. In fact it may cause a violation to be escalated from an infraction to a straight felony. It goes on from there and none of it good.
The claim that the truck is engineered to carry way more than the GVWR rating on the VIN plate is simply not true. You have at most 10-15% tolerance. Let’s face it auto makers don’t engineer in more tolerance than absolutely necessary as it costs money.
All that said buy the lightest camper with the most features and stay as close to your GVWR & GCWR as possible. Remember the weight you’re carrying also wears out your truck that much quicker. Also, no matter the load you’re better off with airbags and big stabilizer bars.
I know the carry as much as you want crowd is going to hate on this posting, but I have see the results of overloading and it’s ugly.