I think the 3.6 would be enough as well. I pulled our 32ft bumper pull camper with 3 slide outs yesterday for a 2.5 hour tow. We had to take it in for some repairs. But the camper weights 6,800 and the 3.6 pulled it just fine. I wanted the diesel but I couldn't wait and I fell in love with the one I test drove so I bought it lol.