It may not be that hard. Mormons believe jesus is coming again and will arrive at https://en.wikipedia.org/wiki/Adam-ondi-Ahman. Some people have been buying land there for this reason.

Joseph's Smith's communal utopia, finally realized? Oh yeah, there are people who will go for this.

Edit: As for farming, yes mormons will be fine with it. Google "mormon food storage" and you'll be amazed. They are taught to be ready for disasters at all times.