I just brought home my 303TG yesterday. My 2500HD pulled it just fine with only weight dist bars and no sway control. I held @ 60 going up a few hills, and couldn't tell it was pushing too much on the way down. I could tell the camper was back there, but no problems.
I pulled a 26ft Jayco Eagle with a chevy 1500 and with a Tahoe with no major problems, but I don't think they would have pulled the 303TG as easy. I think the Tahoe actually pulled the Jayco better than the chevy 1500 did. Not sure if the weight was distributed better or what, but I believe the 303 would be much too heavy for it. I'd opt for a bigger truck than a smaller camper, because that 303 is super sweet!