My son wants to trailer his Jeep with my X. I know the capacity is 5000 pounds and the Jeep probably weighs in at 3500 less trailer. Not sure how much a trailer capable of hauling the Jeep would weigh, but I bet the combined total will be close to 5000 lbs. Will this be safe for a 3 hour drive up to the mountains? Or would we do better to just use a tow bar and let the Jeep free wheel? Looking for the safest technique that won't tax the X too much.