Mike,
What you are looking for is a double axle trailer with a braking system. Kind of like what a car dealer uses to haul a single car. Your Jeep may be rated for 5000 pounds , but you would be taking chances if you pulled more than 4000 including the weight of the trailer. Pulling it is not the problem. Stopping is the problem.
I had a good friend that foolishly tried to pull a horse trailer loaded with wood with a half ton truck. As he was going down a not so big hill the trailer tried to push his truck and wound up jack-knifing. He said he aged 10 years in less than 30 seconds. He survived, and to follow up his bad judgement, had to unload the trailer and have all of us help him haul his load.
Look at what landscapers use to haul a trailer with a yard of sand, rock or dirt. A 3/4 ton truck (weighs 6,000) or better.
Best deal, get a light trailer and when you need a yard of dirt have it delivered.
Bill in New Mexico