Truck bed campers are great, if you tow something to where you camp (IE offroad vehicle or boat) it is much easier than having a motor home that is another giant chassis to take care of... Unless that camper has a slide out on the other side it's probably around 2200lb dry (assuming 10' length), if 12' length around 2500lb. I have a 10' S&S camper and it's listed as 2300lb if memory serves, the 11.6' Lance I had was rated at 2500lb. Not that I'm saying that was a good idea, the COG is at least a foot behind the rear axle...
The camper is why I lowered my F350 2" from the 4" lift it had when I got it... not that it's that bad but only having air bags and a rear sway bar it's tall... right around 12' to the vents.
Those talking about getting in, I have a step that goes into the hitch, it's not too bad, and if I'm towing a trailer I'll usually leave the trailer on and put a small pallet down on the ground for the first step then the tongue for the second...