5th Wheel rear hitch

I am planning on fabricating a hitch for the back of our 5th Wheel. It will be primarily for bikes but may use for other things depending on what plans I find. Have used the 2" receiver that bolts to the bumper before but I am looking to make something a little stronger as I know the bumper is not strong enough.

Have thought of fabricating a hitch to fit to the frame and use a swagman bike hitch. Have also looked at campers with the cargo rack that flip up. Does anyone have any links or photos of hitches/racks that they have added to their campers. Thanks for any ideas!!!