Be careful about the advertised weights of campers as they can be well below what the camper ends up weighing. Does the manufacturer include the weight of the battery, full water tank and LPG cylinders? People commonly talk about adding 1000# to the camper weight to get the real weight when they weight their rig with it on - obviously though you won't be carrying as much stuff as that - no aircon unit, generators, large battery banks, TV, etc. But still bear in mind that unless the previous owner had it weight when rigged to go camping he is probably just quoting the dry weight from the brochure.
My camper sticks out about a foot beyond my load bed. I remove the tailgate - no reason carrying extra weight that is doing nothing.
There are a number of manufacturers that make very light popups. Four Wheel Campers for one.
Steve.
'07 Ford Ranger XLT Supercab diesel + '91 Shadow Cruiser - Sky Cruiser 1
'98 Jeep TJ 4.0
'15 Ford Fiesta ST
'09 Fiat Panda 1.2