hitch mounted bike rack?

We have had lots of experience in this area. Our last fifth wheel was a lightweight and we were strongly advised against mounting a bike rack on it. It had a bumper. So we hauled them inside the camper--YUK. You will be best with a hitch mounted rack where the bikes sit upon it rather than hanging. There's lots of bouncing back there. Even with that be sure the bikes are secured with straps or whatever. We now have a new Arctic Fox and the receiver was mounted on it at the factory so it is frame-mounted. The bumpers on campers are not strong enough to take the weight and bouncing. We got a Kuat NV rack. They are pricey, but very good sturdy racks and easy to use. Second brand I would recommend is Yakima such as the Holdup2. You can haul your bikes and then use the rack on the truck to haul the bikes to bike trails. Our friends have a Saris rack of same style as ours and mounted on their older Arctic Fox Fifth wheel. Their receiver was not factory-installed. I believe it is clamped on the bumper, but reinforced by a welder underneath?? Not sure about that. They have traveled this way for 8 years 6 months at a time with no problem. I just recommend getting a really sturdy rack.