It is a fascinating book, and she is such a singular writer, with a different and unique viewpoint of the 60s (being older than the hippies and not temperamentally suited to an optimistic worldview anyway), that it is completely worth your time.
Another reference point, come to think of it, is T.C. Boyle’s novel Drop City, which also features an idealistic commune that starts out in California and relocates (kids and all) to a remote place once the Man catches up to them. It also does not end well.
(Edited to add: not knocking the 60s as a whole, or optimism, or hippies, each of which has/have their place in my heart.)