I've read very little anarchist literature, largely, as mentioned, because I consider it fanciful. This is not to say that I don't sympathise with the aims and principles elucidated.
In previous posts I think I have misunderstood what we mean by alienation. Or perhaps that there is considerable ambiguity in the concept itself. If we are discussing the ignorance and distance we all have from the production of what we consume, then this seems inevitable, though with troubling consequences. As you point out, how do we know that our air and water are clean?
Another interpretation of alienation is, again, as you say, the Marxist version. Workers are alienated from what they themselves produce. This is far more troubling. Even among the obscenely rich there are those (Soros, for example) who decry the vast, and in recent decades, widening, gulf between workers and owners wealth. However, I find the recognised alternatives, such as socialism or communism, to be worse than the problems they solve.
This, not least, because the various factions tend to collapse into mutual antagonism. The Communist Manifesto (which isn't a manifesto at all - it's a prophecy) provides a quintessential example. The final, and by far the longest, chapter consists of an aggressive refutation of various forms of socialism.
The French and Russian revolutions provide fair evidence of the flaws of their ideologies. In each case, temporary euphoria has rapidly given way to pragmatic concerns which proved insurmountable until the imposition of a brutal totalitarian regime.
Thank you for the recommendations, by the way, especially LeGuin. Haven't read a good political sci-fi in some time.