Ha! I lived in a small town in WI, and LSD was more available than any drug. Not only available, but available in exotic forms: microdots, gel tabs, fancy printed blotter. Sometimes I wonder if it was a government experiment, that's how remarkably available it was relative to other drugs. Consider for a moment it is pretty easy to grow mushrooms or pot, and then consider that a bunch of small-town kids in WI had easier access to a difficult-to-synthesize psychedelic. Wild.
In high school in Australia, it was easy to find alcohol. Don't think there was much LSD going around (some marijuana and MDMA).
I think one difference is when you have 18 as the legal drinking age, a significant chunk of kids turn 18 while still in year 12. They could then legally buy it and then (illegally) on-sell it to their school friends who weren't of legal age yet.
In some cases parents would even buy alcohol for their teenage children. Parents supplying other drugs to their children is not totally unheard of but far less common.
Probably for the best, but I'm not sure what it means. I would think Utah would be unusually difficult to get alcohol, since (most) kids couldn't just raid their parents' liquor cabinets. Not sure how Utah's rather unique culture would affect availability of LSD.