Adding mowing to my service this year. Towing a 16' dual axle steel trailer with plywood walls, a Walker bagger, handhelds and grass mulch. A new 2009 GM pickup is what I am looking at. Will a 1/2 ton with the towing package and a 5.3 be enough truck to lug the trailer around town, or is a 3/4 ton the better choice? Thanks in advance.