There is no problem with that camper on a short bed extended cab truck. This is an AF811 on a F250:

Get the camper package and 18" wheels whether you get a F250 or F350. The F350 will come with rear overload springs and 18" wheels standard but still need the camper package to get the rear stabilizer bar. The rest of the F250 is the same as the F350.
To carry 7000 lbs level on the rear of my truck only required upper and lower StableLoads:

Air bags, shocks, 19.5" wheels and SuperHitch were added so I could tow my 8000 lb trailer behind the camper.
