By now you should have figured out vehicles can pull more than they can a carry.
Simply put, once you weigh your family, toys and other tow vehicle goodies you cannot live without; then subtract it from the tow vehicles max cargo capacity what is left is the tongue weight you can carry.
A rough figure of tongue weight is 13% of the TTs gross weight limit. Or in everyday figures my 5000 lb. dry weight TT weighs 6200 lbs. when loaded for the road and has 750 lbs. of tongue weight.
When I add may family, I have axed out my F-150's cargo capacity.
The CAT scales do not lie.
Good Luck