All I can tell you is my experience. I have an extended cab GMC Duramax and an Outfitter Apex 8. Very seldom done cold weather camping, so no help there. But I have driven some very rough roads, and have no problems with either the truck or camper. I have never drug a jack, but have touched them - so always a good idea to watch when appropriate.
I looked carefully at Alaskan, Fourwheel, Northstar, and Hallmark before buying my Outfitter new in 2007. No regrets whatsoever.
Trip reports are on my
web site, with summaries here -- in the
Truck Camper Trip Reports thread. A LOT of good information there.