Driving to Durango CO from Moab with a Fifth Wheel

Thank you for the input. We have it all but exhaust brakes. It is me (the wife) with worries. My husband says that he will use the tow/haul option as well as second gear. We went down 6% for 6 miles when driving to Moab from Zion park. We had to stop to let brakes cool off (it was in D and not 2nd like we learned should have been).

It went down ok eventually and I guess we will follow the 2nd gear and Tow/Haul option until getting a new truck with exhaust brakes.

I appreciate your respond!!! Thank you