The tires will be the first limiting factor. And you’ll be maxxed out there.
Srw will obviously pull and stop it the same as a drw. And with 19.5s if you add them, tire and wheel capacity won’t be an issue. Handling will be better with a dually but with a 5ver, a srw will still be reasonable.
Biggest consideration imo is what you didn’t mention. How much towing vs how much bobtail driving? If you’re traveling regularly with the trailer I’d go dually. If you’re moving the camper a couple/few times a year and staying put and the truck is a daily driver more than a tow rig, I’d go srw.
