Wanna take a trip to Alaska? Cache Camper makes custom campers. They can make anything you want. According to their web page their 6′ camper weighs around 1200 lbs. I had one of their campers on a F 150 and it worked fine.
2016 3500 HD Durmax
1994 S and S 9.5' Camper (SOLD)
1999 S and S 9.5 Camper