I have a 2016 Landcruiser and have been towing a 28’ Airstream Serenity for over four years and way over 2000 miles. The trailer has a base of close to 6000 lbs. and a gvwr of 7,600lbs. I had my hitch set up so the trailer is perfectly flat using Airlift air bags in the rear. I feel the rig is...