I'm going to say something that many will take as arrogant or condescending or whatever. But trust me when I say it is not meant in any of those manners. I do landscape maintenance and am also a full-time firefighter who drives the fire truck. I have a CDL class A and drove for five years one of those ten-wheeled rigs delivering Pepsi-Colas before I was a firefighter. I say this to point out I have been towing trailers for close to 30 years now. Probably 80% of the time I'm on the road these days, I'm pulling some kind of trailer.
I see all these posts mentioning "white knuckles", "uncomfortable", etc.. There is one factor that many of us SRW guys are probably thinking. If you are not very experienced, not comfortable, or maybe you just aren't as good as others pulling a trailer, a dually would certainly help with larger toy haulers. I don't get uncomfortable, have white knuckles, and I'm certainly no more tired after a long trip pulling my 43' toy hauler with my SRW F350 than if I was driving the wife's Kia Optima.
I'm sure some here will take offense and think I'm saying they aren't as good at pulling a camper than I am. That's not my point. But if you feel you have to have a dually truck to not experience the adjectives I mentioned above, well? I'm not talking about guys pulling 1000 lbs.+ over weight on the pin or something extreme. But I'm over on GCWR, sometimes slightly over on my RAWR, and at 43' long, sometimes I wish the camper was longer so I could fit more stuff in it.
If the shoe fits, put it on guys.