You could also just put a container of water in the oven to provide that moisture and maybe it's not a big deal when you don't live at high altitude as well. (foodsofourlives.com)
The coffee is shade grown at high altitude and is then processed using the wet method. (dailycupo.com)
I have never baked in High altitude I would maybe follow other cake recipe recommendations for baking at high altitude. (sweetlittlebluebird.com)