Like everyone else they had a compound. Theirs was by Yellowstone and they stockpiled weapons waiting for the inevitable pseudo-Christian apocalyptic disaster.
Ms. Prophet had a unique preaching style, and fortunately a recording of one service at least survives. This is from my 20th birthday! Many of you will have heard one of these tracks ("invocation for Judgement") because it's an attack on rock music that lists a long series of popular bands in 1984 that must be destroyed, and are comically mispronounced (Cindy Looper, etc.).
Decree 12.10 is only for completists, as it's basically 27:57 of deranged cattle auctioneer/martian hoedown/speaking in tongues. The others are great though. If you just get one, get #4, the Great Divine Rector's Call. Please download rather than streaming, and mirror if you want to share.