I'm towing a 6200 pound GVWR ultra light trailer (26ft box, single slide, aluminum and fiberglass frame) with my 17 XLT EL with family of 5 on board. We also usually have inflatable paddle boards, firewood and sometimes a generator in the back as well. Your trailer is a bit heavier but not grossly so. I camp exclusively in the mountains of Idaho and the expy pulls like a freight train. With the husky centerline setup correctly, I'm level with no sag when I'm hooked up and I often tow with full fresh water tank.
The weight ratings are less than the pickups because you have IRS which is pretty soft. Get LT tires, make sure your trailer brakes work well, don't drive like a maniac and you'll be fine. Also worth noting, if you were camping every weekend year round, a bigger tow vehicle might be a good idea but for casual seasonal use, the Expedition is a great tow vehicle and comfortable people hauler in the off season. The same can't be said for a 1 ton pickup. I've seen some pretty shady tow vehicle setups that are obviously grossly overloaded (like a 30ft trailer being pulled by a platinum F150 with a big ATV in the bed) and I give them a wide berth. There is some safety margin engineered into everything, but wear items like axles and bearings may show accelerated wear most owners wouldn't think of. Which is also why I won't buy used vehicles that have obviously been used for towing, no idea if it was done correctly or within load limits.
How can you tell something has been obviously used for towing?