I have an opinion and I have experience. But without knowing the hitch weight of the trailer, the trailer weight, if you plan to run an equalizer hitch and the extension length required I can't even begin to say if it will work.
It isn't the static load that you have to worry about but the dynamic load from bouncing and dips you have to worry about. The longer the extension extension the worse the dynamic loading.
In regards to just adding a second tubing to mimic a Superhitch, there is more to the Superhitch than just a second tubing. You still have to worry about all of the torque placed on the hitch connection to the truck and it's reaction to the truck frame.