As a couple have said above, use your lower gears to control your speed going downhill. Don't rely on your brakes, or you will burn them up. Downshift at the top of the hill, before you gain any speed. Don't even think about going down steep hills at the speed limit, or you will be braking at every turn, which is bad.
Pull over if you are climbing a hill and there are more than 10 vehicles behind you. You can get a ticket if you don't allow them to pass.
Be very wary of roads that show lots of curves on the maps. Going up is a slow process, and going down can be nerve-wracking. Many of the roads have steep drop-offs to one side, and it is normal to be skittish on those roads. But, being too cautious and using part of the oncoming lane is dangerous, so if you are not comfortable with that type of road, don't use it. Independence Pass is very narrow, winding, and steep. Don't even think about pulling a large trailer over it, as there is a section on the west side of the pass that is one-lane.
Speaking of one-lane and narrow roads - if oncoming vehicles meet on a one-lane road, the vehicle going uphill has the right-of-way. If you are going downhill, you will have to back up to the nearest wide spot. Avoid narrow roads.
Enjoy Colorado! There is much to see and do; just be aware of what is up the road. Most of our roads are fine for trailers, but some are not. Can't list them all, so pay close attention to a good map.
2017.5 Lance 1995
2017 F150 EcoBoost, Max Tow
Most camping off-road