No worries, you are all good.
Our class G license allows us a combination of vehicle and towed vehicle of up to 11,000kg. The allowed towed vehicle weight is 4600kg but can exceed this if it meets certain criteria.
As for the MTO they are only concerned with the braking ability of the Tow Vehicle and Travel Trailer, mainly that the Travel Trailer weight does not exceed the tow rating of the Tow Vehicle.
Enjoy the new trailer!!!!