I am still new to towing behind my class C and here is a quick question.
I will be using my MasterTow dolly to carry my two kayaks to a lake so do I have to use break controller and the towing button or not?
If the electric brakes are already wired in, there's no need to disable it, you will probably have to adjust the gain to the lower settings so it will not lock up.
While technically not necessary for the trailer pictured I have been using Tow mode without any trailer on our last 4 or 5 trips and what a difference it makes. The transmission is less eager to downshift on slight inclines and there's more noticeable downshifting on declines to help with braking.
Just my 2 cents!