So here's my take on the debate.
I've owned 1 ton SRW and DRW trucks. The DRW truck tracks better and carries a load better.
So I currently have a 2013 3/4 ton GMC gasser that I have made upgrades to that improve the towing experience. The #1 most beneficial upgrade is wider wheels. This is a dramatic improvement. I still use the same tire size as the stock optional 265's. The new wheels are 9'' wide vs the 7.5'' that came with the truck. No longer does the truck feel pushed around by the coach. This is for me, better than a dually. Ok, I know, here comes the argument...payload...This truck has a 2981# "yellow sticker". The 2018 SRW diesel 1 ton I just test drove had a payload of 3100#. Alright it was a loaded Platinum edition but it was $82 large, but 200#! I know the dually has way more payload. But I don't want a dually. My pin weight is somewhere around 1900# so I have 1k# left for everything else. I weigh 180 and baby weighs 120. Hitch probably 225 leaving me with about 475# for the rest of my gear. Bilstein shocks and airbags with onboard air, this is a pretty comfortable ride now. I'm close to the max payload but within spec and I am not over stressing the TV. So I don't necessarily agree with the statement here that a 1 ton is a must. A guy has gotta do what he is comfortable with.
I wasn't comfortable with the stock junk leaf spring and electric drum brakes on the coach so I spent a lot of time and money on a serious axle, tire, wheel, and brake conversion for the coach. This made the overly bouncy, inferior braking coach a pleasure to drag around. As much as a 10k trailer could be a pleasure that is.
So to sum it up...For me, no dually and money put into a better performing suspension on the coach and truck. Now I am in my comfort zone. FWIW