I just purchased a 2012 3500 long bed Dually, 6.7 Cummins. I plan on towing a fifth wheel camper. Gross weight on the 5ver is 15950. The only addition to the truck will be the Reese 20K hitch and nerf bars. I've read all the weights, combined weight, gross weight, combined gross weight articles and formulas. Frankly, it's all a little confusing to me....I was never good at math. I want a good, clean, simple answer to my question, if such a thing exists. Will my truck pull this camper? Thanks in advance.