Weight distribution (or balancing the weight on the trailer) is a very important factor when towing at normal highway speeds. Now if we're not refering to a 'gooseneck' trailer, one of my concerns is not overloading the 'tougne weight' of the hitch itself. The tow capacity may go well up to 10,000 pounds, but the weight on the tougne is a lot less, maybe at 1,000 lbs.. I was towing a car from way up north and right after I got it loaded, I knew I was going to have to re-position it. The trailer had a tendency to sway around now & then. After moving the car forward another foot & a half, made a big difference. And I did not need any air bags or sway controls to get this great improvement, drove all the way home 55 MPH without any problem. Most trailers capable of a least hauling a car have their axles closer to the rear of the trailer than they are towards the front. That way, their will be some weight applied to the tougne. But having to 'correct' the height of a vehicle's rear, I would wonder if the 'tougne weight' is being exceeded. If you don't want to worry about that criteria, then you'd have to go with a 'gooseneck' design, which is what I want to do next time I get the funds up to purchase a trailer. And just to let people know, I have had experience hauling a skid steer on a car trailer with the same GMC 1500 series 4X4 (& no trailer brakes), this is not the most pleasant feeling going downhill, but the episode can make one appreciate what inertia is all about.
J.W.