Thanks for the feedback. Let me expound a couple items...
Our family of 5 consists of my wife, my 11, 7, and 3 year olds which adds about 600 lbs to the vehicle's gvwr. The max tongue load for the older Expedition is 920 lbs and the tow weight is 9200 and the 2018 is 930/9300. The GVRW of the Expedition varies from 1700-2000 lbs.
If you bumped the tongue weight to say 850, added the 600 lbs from the family, and another 300 lbs of "stuff", we would be right at the limit of the gvwr but would still be well within the limit of towing. That said, if we were mindful of the situation, we could also load the gear in the trailer itself and stay well below the tow weight.
Thoughts?
Jeff