Tossing a standard pickup camper on a flatbed certainly has its merits.
It creates loads of stowage, and allows you flexibility when shopping campers.
There are always slide in pickup campers on the market, pick your poison.
The the biggest benefits though, a true flatbed model is where its at.
The floorplans open up a ton, and it provides the option of a side entrance.
Rear entrances always load up with road grime. Sides stay pretty clean.