Thanks again for all the input everyone. I could never have imagined that payload capacity would be such a hard thing to determine!
In my case, however, it seems that a dually is preferred. However, I noticed that srschang alluded to having to deal with snow with a dually. Living in Quebec, snow is a given. Is a DRW problematic in the snow?
Also, on another topic, my driveway has a slope of approximately 8% downwards from house to street. I'm concerned that leveling the camper after removing it from the truck will induce bending in the jack posts as I raise the front legs, which I understand could cause jamming and be problematic for the jacking mechanism, etc. It seems to me that the only way to avoid this would be to build a ramp of some sort for the front wheels to back up onto such that the truck and camper are both more or less level before unloading the camper from the truck. Am I right to be concerned?