Looks like you will be right at the limit of the GCVWR once you put all of your belongings and passengers in the truck/trailer but I dont think it will be an issue. You gotta remember that these trucks can tow 11000+ lbs when properly equipped so the chassis and driveline will be able to handle the load just fine. The 2.7 ecoboost is a stout motor and honestly think that the tow ratings on it are heavily underrated so I dont think you will have an issue on the power side of things either. The only issue I forsee you having would be the cooling system not being heavy duty enough.
I'm not saying to overload the truck, I am just saying I think you are going to be more than ok right up to 13300 lbs.