I am hauling 26 foot, 5000 pound travel trailer with the same truck, and have no problem at all. I have a cap on the back of it and carry two long sea kayaks with a 17 foot canoe between them on the roof. I also have the bed loaded with all our back packing and paddling equipment.
It tows it much better then my old ford F-150 and I am getting 2 to 3 MPG more than I got with the Ford . .
My last trip with it was a 2000 miles one and I averaged 10 MPG and most of the time never felt the trailer behind me
Time will tell, but right now I am a happy camper.
Jack L