[RMcNeal]

Darrel, if your unit is like mine, the cargo "hitch" is only rated at 300 lbs. Kinda useless with that little weight.
I have a pull out garage in our 3791RD and putting a cargo carrier on the back would block access to the garage so I have never used it. I have been considering putting a rack to hold kayaks vertically, just haven't found one I like yet.