Not sure it is no concern among the mid size / half ton crowd. I am doing an F150 overlander and I have to be VERY careful about weight of the loaded camper. However to be blunt, when you leave enough space for a person to actually sleep in it, a camper shell camper really doesn't have enough room to get stupid with overloading it. I crunched the numbers, including the loaded fridge, pantries (5 gallon buckets with Gamma Seal Lids) and 28 gallons fresh water, I am still under 700lbs of load. My max payload is 1770lbs. My tires are massively upgraded to load range E and I am running upgraded dimpled and slotted rotors / brakes. My concern is not with how much I am carrying so much as keeping the transmission temps down when pulling mountains. Even with the towing package, it still has a tiny trans cooler...
Would I prefer to have a HD pickup? Absolutely, but budget is what it is, I mean seriously even 20 year old used 3/4 and 1 ton trucks are regularly fetching $20K plus. And that is for a well used truck, not some low mileage pristine driveway queen.