We use a Kuat NV platform rack normally (when we go biking), but not on camping trips. We tried it on the back of the fiver - seemed logical since we already owned the expensive bike rack and loved it. However, the bikes rocked back and forth too much. We tried bungeeing the bikes to the back ladder after putting them on the Kuat, but they still had too much movement. With the road bikes, it might have eventually worked, but I discovered that the mountain bikes which have straight handle bars were hitting the big rear window of the fiver. We decided to abandon the idea before we completely shattered the window.
We switched to a Yakima roof-mount system on top of the truck. Works well since you don't have to worry about the height (the fiver is taller than the bikes), and they are out of the way. Also, someone would have to work pretty hard to get at them, so I don't worry about them when we stop to eat or whatever.
2016 Ford F250
2014 Open Range Light 318RL