Well here goes nothing. I was using a "around the spare tire mount" u-bolted to bumper hitch to hold the bikes and a vertical u-bolted to bumper mount for the "Blue Boy".
I wanted to move the bikes to the front of the pickup so I could use the back of the camper for a cargo tray (rated at 500 pounds) using a RV bumper mount 2 inch reciever (rated at 500 pounds) and put a 200 pound generator in it. I bought the truck nose reciever mount and 2 bike carrier that goes in it; The cargo tray and bumper mount; and moved the camper tire to the truck bed.
After hooking it all up it seemed WAY too flimsey (the bounce made me VERY nervous even in the driveway). Loosing that generator on the highway would really tick me off; not counting the liability issue.
So I investigated a RV Class III FRAME mounted hitch (made by CURT) that bolts onto the camper frame. Doing the research I should have done at the start showed that FR will not recommend ANYTHING mounted to the RV bumper or Ultralight Frame not originally installed at the factory. (Read the spare tire mount on the bumper)
Others had said the the rear RV bumper is only rated for 150 pound load at 6 inches from the bumper.
So now, (shame faced
) I have the new 2-bike rack on the 2 inch bolt on the RV bumper mount reciever, the empty "Blue Boy" mounted directly over the bumper very close to the frame weld, and the original spare tire mount also mounted as close to the frame weld as I can without blocking the turn signal and the Generator is back in the truck bed. I did install the nose hitch mount on the front of the truck (hell its paid for), but the cargo tray sticks out too far IMO.
Drove up to the Pocono mountains like this with no issues so far.
I think that FR's stand is overly conservative (though understandable from their perspective), but maybe not. What do you think?