I think your biggest issue is length, depending on how you travel. If you have a wife, 2 kids, and a bunch of stuff to take I would think that would be beyond the comfortable level for a half ton. The truck would do it with air bags and a good weight distribution hitch but if you were ever in a situation you needed to maneuver quickly, large bumps, or strong winds you just wouldn't have enough truck to keep things tame. People have done it, its mostly about the risk you're willing to take.
I have a 29' one close to that weight being pulled with the 5.7 Hemi. 1 wife, no kids, couple dogs, and pack fairly light with Airlift helper bags and a weight distribution hitch with friction sway control. I have the camper almost perfectly level (a little towards the nose) and the truck very level with 3/4" of squat (bilsteins at 2.1 up front with 3/4" spacer in the rear) and it tows very well. Feel confident on bad roads, controlled in winds, and the engine and transmission temps are just fine.
I would not willingly add another few feet or 500+ lbs to the equation if I were traveling any significant distance though.