Regarding the hitch receiver for my motorcycle carrier. I had it fabricated from steel plate. It is bolted to the rear frame cross member, not the bumper. I will try to post up photos of the installation in the next day or two. I just finished a 5K mile, 5 week trip with it and everything worked well. The bike and carrier weigh 350 pounds. I did get a bit of sway at over 65 MPH. I have not pulled the camper that fast without the bike on the back, so I don't know if the set-up is making it worse. I normally travel at about 62 MPH on the interstates due to the speed restrictions on the camper tires.
2015 T12RBST Flagstaff Hardside
2008 Itasca Meridian 37H