I used to pull a 26' box with my 1/2 ton but the 3/4 ton is much better. With the distance you travel I would buy at least a 3/4 ton. Not only is the suspension going to be better for the weight but the axle bearings, wheels and tires are designed for the heavier load. If you already had a truck I MIGHT consider using it for shorter trips but you have to buy a truck anyway so you might as well buy something better suited for your needs. It will save you money in the long run.