A fifth wheel without anti-sway bars?
It will tow so much better than your travel trailer ever did. The hitch pin is 1" or 2" forward of the rear axle, and causes the trailer to 'swing' the same direction as the truck is pointed. It also puts some weight on the front axle, while most is on the rear axle.
You picked a 3500 truck, it should have plenty of cargo rating for the 2,500 pound pin weight. You might want to stop by a scale anyway, to check the truck both without and with the trailer.
Remember that the fifth wheel hitch comes in a 200 pound crate! They are not light. Your truck GVWR might be 11,000 pounds, and the empty weight with that heavy diesel engine option is going to be well over 7,500 pounds.
Good luck, have fun camping!
Fred.