Sure hope your axles weren't overweight. I'm guessing you are pulling either a 30WRS or a 34WRS which gives you somewhere around 4300-4500 pounds of cargo capacity. Should be plenty for that load unless the bumpers weigh more than I would think.
Gross was just under 25k #
Had plenty of headroom on trailer, truck and hitch.
2011+ Ford Superduty bumpers are light for what they are, ~200#s, they look a lot heavier than they actually weigh.
3/4s of a tank of water too.
Coulda put another 2000 on the trailer
34WRS w/ 7000lb axles & G rated tires.