Car hauler trailers

I regularly haul my wife's 06 Saturn Vue to or from the beach when we go to or come home from there at the same time. If she is already there and I go for a weekend when she's coming home, I take the trailer and haul her car home. The diesel doesn't know the difference, and it costs less to do it that way instead of feeding both vehicles. The Saturn weighs 3900 lbs. and the trailer handles it easily. The biggest thing I've hauled on my trailer is a long bed 88 Dodge pickup. It probably weighs over 4000 lbs. and the trailer pulled and stopped fine. I've hauled my Challenger conv to The Nats 3 or 4 times and to The Turkey Run once. Hauled @Big Dad Valiant wagon to BFE Oklahoma to meet him when he lived in TX.
The only times I've had any trouble out of my trailer was when I let somebody borrow it. It came back with bent fenders once, and the front axle looked like a horse shoe the next and last time. That ended me letting anyone borrow it.