Driving with and without my trailer north of Charlottesville this past weekend, including up to the top of the Blue Ridge parkway, trailer tow mode helped out a lot. When heading down the hills, tow mode downshifted to keep me from having to use the brakes as much. It helped even when not pulling the camper.
Current: 2020 Rockwood MiniLite 2205S
Past: 2018 Flagstaff MicroLite 21FBRS
Past: 2005 Flagstaff Classic 625D
TV: 2016 Ford F-150 3.5 EcoBoost