All of you welcome to the forum. Now the bike rack I think you better check the welds on the bumper . they may not be the greatest. Bikes on the back of a camper take an awful pounding. I carry mine up on the kingpin and they never move.
In stock form, I wouldn't have attached a bouncing and dynamic load to the bumper. With a piece of steel stock and a few welds you should be good to go!
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Mike
2013 Jayco Eagle 334RBTS
Crossroads Forum Lurker