I walked by myself, and though there were always people not far away on the Le Puy route, in my early weeks I walked alone most of the time. Maybe I didn't experience 'deep transformation' but I think in that quietness, I did experience changes. When my feet were very sore in the first ten days, there came a point where I realised that I needed to concentrate on being thankful for what was around me, rather than on the soreness of my feet. So being thankful in the present moment- perhaps that has been a gift of my Chemin. And I am glad I had those weeks where I just walked pretty much with myself alone, though I am also grateful for the company I had later on- especially over the Pyrenees, and in the last 100km from Sarria when I walked with a couple from Quebec the whole time. (I had first met them three weeks into my Chemin just after Cahors in France, and we kept losing and finding each other from then on!)
I think though that sometimes people are hoping for a transformation on the Camino that does not always happen. I met a young woman at a cafe on the rural route for Astorga. She was, I believe, deeply unhappy to the point of considering suicide, and had hoped that walking part of the Camino might 'cure' her. It hadn't, and she was about to return back to London where she was studying. I often think of her, and hope she is still alive, and that her life has become happier.
Margaret