New.Flatbed. What should I be concerned/thinking about.

First, I don't have one, but some thoughts nevertheless. These are probably obvious. Depending on the camper you put on, your top bar might not clear. I'd consider thinking about adding some type of stops to prevent the camper moving side to side because the camper won't be anywhere near as wide as the flatbed. I'd also consider a rubber mat depending on what the surface is.