I don't see weight limit ratings on any of those racks. That should be in bold and up front in the description, but it is absent. So... If it breaks off in transit or your frame gets damaged from the extra forces involved, it will be YOUR fault because you will have overloaded the rack or the frame. I don't see anything on that Lippert link that shows or tells you how to attach a bike or anything else on their racks. I guess they don't want the liability and you're on your own.
Friends of ours have a slide-out version on their Keystone. Not overly impressed. A lot of extra expense, weight and bulk when stuff could easily go in their truck.
I don't trust anything Lippert, but that's just me. Had an extremely serious issue on something once and they initially came back with a stock pat answer - "it's within spec." Inspection by a pro. proved otherwise. Anything frame related and Lippert make me very wary...
If I wanted a bike rack, I'd be looking at the one that mounts above the tongue area. You can also keep an eye on bikes there while driving too.