I have that truck in the 2011 flavor with the camper package, and 6.7 diesel. Airbags, good shocks, and Torklift frame mounts are a must. We also upgraded to the magnum hitch since we also tow an occasional toy too. Very happy.
.We have a heavy camper, 2005 Eagle Cap 950, and it drives very nicely, without too much sway even with full tanks. To put it into perspective it could've easily done 80 up Blewett pass, but I'm not risking smoking a tire running singles at that speed and weight.
If you're looking for a great camper that's always been under cover and pristine let me know. It's just time to get a bigger house and we're consolidating. 3 kids and a small house isn't cutting it anymore.