I am close to purchasing a 2020 Keystone Cougar bunk house (29BHSWE) and will be pulling it with a 2018 Ford Expedition Limited Max. Tow capacity of 9000lbs. Weight of trailer is 6,810 dry and GVWR ...
It almost always comes down to vehicle cargo carrying capacity over gross trailer weight. My CrewMax was rated for 10,400 lbs which is great, but the cargo was 1,387 lbs which is anemic. Once the hitch got lowered I was always over on the cargo. They all love to advertise off the gross tow rating but at the end of the day, check the cargo.