Don't know about the 1970s, but I've been to Utah recently. Beer is available on most menus of an Appleby's class restaurant on up. And if you want to buy a six-pack. you can do so in any local convenience store if you are of the proper age.
Compare that to Pennsylvania where we still have those 17th Century liquor laws, including state-owned stores
Mitt Romney supposedly fixed the beer thing as a prerequisite to landing the Winter Olympics. My dad used to go there in the mid-70’s.