I have a 36ft, 7300 lbs empty, probably 8700-9000 (trailer GVWR 9989 lbs) loaded up, 1000-1100lbs tongue weight travel trailer that I started towing with an Expedition EL (2017) using Blue Ox Sway Pro. After the first trip, I knew it was not going to work out.
I borrowed my fathers F150 to see if that would do better, thinking the IRS of the Expedition was the problem (along with the tires), but it really only did marginally better.
The problem isn't so much sway, but the wind just pushes the Ex and F150 around so much more than I was comfortable with while towing. Soft and squishy feeling.
I now have a F250 in the driveway. Tows 1000% better. In turns you can really tell a difference.
I think you will find that an F150 will tow it, slowly, and it won't be pleasant.
Unfortunately, I didn't find this forum until after I already purchased the Expedition and the trailer. Otherwise, I think I might have saved a boat load of money that I lost on the trade. I guess some lessons are learned hard.