To compare the Wrightwood Country Club's water usage with that of Mt High's is like comparing apples and oranges.
Your comment "if Mountain High has the legal right to use it's water" is way off base just the way it's phrased. Mt High has no water rights as those rights belong to the forest service.
Mt High's water use is a complicated issue with many facets.
One aspect to look at is the issue on the source of the water and where it's being diverted. Mt high is pumping water from Swarthout Canyon and moving the water to Mescal water shed and that's not allowed with riparian water rights under California's water law.