I have a Expedition long wheelbase which I use to tow with. I have a smaller trailer and no issues.
As noted the payload can be eaten up quickly. I put everything that I can in the trailer so that in the Expy I only have the passengers, dogs and snacks for on the trip. It helps to keep me away from reaching the max payload. You have to remember that the hitch head adds weight from the allowable payload, they are fairly heavy as well depending on the setup you end up with. The rear springs are softer in the Expy then a pickup so a good weight distribution with anti-sway is a good investment.
