Make sure you have enough truck engine to control the load behind. The 6cyl. engines can be iffy in any kind of hill and a load behind. A half-ton truck is really not the truck it used to be, not up to pulling and managing a loaded horse trailer.
You need a truck that can STOP the load behind if your brakes go out, road is wet. Power for when you get hit with the blast of air semis leave behind as they blow by you. Will you be able to maintain highway speeds with the trailer behind you in hills, rising roads? I couldn’t when I was pulling one 900# horse in a steel trailer with my tired F-150. Previously I had only hauled in flat ground, had no problems until this long trip north!
If you do go with a bumper hitch, get the anti-sway (also called load-equalizing) bars and the hitch receiver that holds them. They are an immense help in controlling the load behind, well worth the cost. Use them EVERY trip with the trailer. Make sure the trailer hitch is a good one, capable of handling the load of horse trailer. All frame hitches are NOT EQUAL! If you are buying a new hitch, have the hitch mounted so trailer tongue is about 2 inches above level, with empty trailer hitched on the ball. With tongue above level when hitched, the tongue will drop to level when horse is loaded, giving horse a more comfortable ride. Loaded trailer with tongue very uphill or downhill, the horse will be constantly shifting to keep balanced. Very tiring way to ride over any distance.
We have a wonderful winch from Sears. It has been on 3 different trucks over the years. Probably could load the carriage by itself by now! I understand they have cordless remotes now, sure would be the way to go with a winch. I would probably brighten up the remote to be able to locate it easily during loading! Maybe buy a spare remote to have, in case of an accidental loss or damage problem.