La Veta Pass (Colorado) with old and heavy RV?

I went over La Veta Pass last week with my TT. It is probably the most gradual climb of any of the passes we encountered on this trip. It tops out at 9,426'. There are passing lanes going both directions so people can pass whenever they want.
Make sure to shift down on the way up and down. I would not be surprised to hear that you go up and down in second gear doing 35 mph. Keep the gears low and let the engine work going up and down.