I carried a slightly heavier camper until a SRW 3500 truck until I sold it with 180k miles. Miss the truck but like the automatic (most of the time). I would still be driving it with about 220k on it with no problems and only 1 upgrade if it wasn't for needing my wife to be able to drive it.
The only upgrade I did to it was upper stable loads. However, she still rock and rolled when going off-road which is just a thing that's going to do with the higher center of gravity. Only real way to fix that is slow down and not be in a hurry.