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

La Veta is not too bad, and eastbound is easier than westbound. The west side is not as steep so going up a little easier. Going down the east side you will need to watch your speed carefully as it is steeper.

Or, from Alamosa you could take CO 17 to US 285 to Poncha Springs and then US 50 to I-25. One pass south of Poncha Springs but not bad at all. Listed as 3% on CDOT. Probably easier on your nerves, and RV, that way.

https://www.uncovercolorado.com/activities/poncha-pass/