Climbing steep grades...

Just another thought. If you have a PAC or Jake break, be sure you use them going down. General guidance is same gear going down as going up, but of course, if you've never driven the road, that's a bit difficult. However, same general procedures going down as going up. Downshift to what you think might be right and slow down to keep from overturning the engine. After you down shift, if the coach is slowing on the hill, feed it a bit of gas as long as RPM's stay in a reasonable range. If not, up shift one and start the procedure over again. If you are accelerating as you start down, use the service brake to slow down below the first speed you selected and see what RPM/speed does. If speed starts up again, downshift a gear, slow down and start the process over again. This sounds complicated but as you gain experience, you'll be able to guess the necessary RPM/speed closer and closer. Just know that this is a continuous process that never ends due to traffic, road grade changes and other conditions vary, but you'll find it easier as you gain practice. After a while you'll find yourself doing these things without conscious thought and then you'll find mountain driving can actually be fun. Besides, the views are great.