Hi, LesBrass, I'll take a stab at this. But I don't presume to have the answer to your questions, just my own experiences to share. My habit of walking alone evolved slowly. My first three or four caminos, I went with a specific walking partner, either my husband (who later decided he HATES the camino
) or a good friend. As everyone knows, walking with someone involves a lot of compromises, changes, adjustments, etc, that just don't come up when you walk alone -- but the desire to be free of those entanglements was not what led me to start walking alone. It happened when one of my pals had to bail out of a planned walk together at the last minute. At that point, I really had no choice, other than staying at home. So off I went, and I discovered that I LOVE it. I love the freedom, the challenge, the self-sufficiency, the solitude. So that was easy, really, starting to walk on traveled routes like the Primitivo, Sanabrés and Vdlp. Walking "alone" on those routes is usually a misnomer since I have always had companionship but could also always just walk on my own, knowing that there would be people at night, at the breaks, etc. So from there, it turned out that there were all these amazing routes out there that nobody walks. Maybe the first was the Salvador (oh how that has changed, no longer solitary!!). In 2008, I had company for the first two days, and then off by myself, all alone in the albergues, on the route, etc. Those first two days were really kind of like getting ready to push me out of the nest, in some sense. I was fine, and fact is, I never really thought this through consciously till now.
Then a few years ago, my family insisted I get a GPS. I was going to walk the Camino Olvidado from Bilbao to Ponferrada, a route no one walks, and I hooked up with a forum friend who was also interested. Turns out she had to leave after a week, so I had to sink or swim with the GPS. Now I am only marginally competent, but it gives me a HUGE amount of comfort and confidence. Having the tracks eliminates all the moments of what might otherwise be panic if you are on a solitary route and can't figure out where to go (there were several of these moments on my Castellan0-Aragonés and I am now a firm believer, not for the traveled routes, but for the solitary ones).
The incident at Baamonde, along with the 7 or 8 incidents of flashing that I've witnessed over the years, did put a bit of anxiety into the whole equation. This is the point at which I would never pooh pooh anyone else's fear. If you can't overcome it with rational thinking, which I did after Baamonde, you just shouldn't push it because you will be a nervous wreck and not enjoy the walk. My reason tells me that I am exponentially safer on the camino than in my own country (I have read statistics on the numbers of violent crimes on all Caminos in Spain over the past twenty or so years and the number is under 20, this is astonishing) and that the "bad guys" are unlikely to hang out waiting for peregrinas on the untraveled paths (and in fact, all of my incidents have been on the Francés or the Norte), and that I just have to box up my worries and send them home.
So maybe the "secret" for those of us who wind up walking alone is that we started down that path unintentionally and then at some point found out that we were doing it and loved it. Sorry if this is rambling, buen camino, Laurie