For a Class III trailer hitch for your 1989 Ford LTD Country Squire Wagon you can use Curt hitch # 13707. It is rated for 400 pounds tongue weight and 4,000 pounds gross trailer weight. When used with weight distribution it is rated for 600 pounds tongue weight and 6,000 pounds gross trailer weight. Towing a utility trailer is basically the same as towing a travel trailer in terms of equipment needed so I don't think you will have any problems.
However, you will be limited to the towing... view full answer...