I second blackedoutharley's point. The campers that are being built today are much lighter than the ones built back in "the day". Simply due to use of newer lighter structural materials.
Hardwall Camper (dry) weights range from 1600 lbs to 4700 lbs! 
Slide In Pop Ups range from 1400 lbs to 2000 lbs
Although by the time you pack them full of gear they are still pretty darn heavy, and that high profile can be scary in strong cross winds.
Here is an inspirational photo for ya.
Good luck!