After flying down the Cajon Pass many years ago with no toad braking, I had an M-G air brake system installed. I think that was in 2013. Been using it ever since and spent from then to 2020 full-timing on the road. You won't be sorry -- its the easiest thing in the world when you're hooking up -- one air hose and that's it.
We have a Prevost CC Conversion and tow a 2013 Jeep (JK).