I think the pull of the camino is that it's quite safe, and you know where you are going each day, and you're getting lots of exercise and fresh air, but it's all new and exciting and very far from everyday life. All these things combine to make you utterly PRESENT for the experience. Your mind is not full of laundry and grocery lists or appointments or plans... all you have to do is walk, and chat with people, and find dinner and a bed. You are set free to think all the thoughts you've shoved aside all your life. You can stop and examine the flowers, ants, donkeys, cheeses, sausages, beers, whatever takes your fancy... you have time! Each day is an adventure, new things are constantly happening, interesting people appear and vanish, you are challenged every which way and somehow you meet the challenges. And it's a pilgrimage, too -- in all that wide-open head space, some people find the bit of God that's lived inside them all their lives, but that they'd somehow forgotten, or buried, or rejected.
The pull of the camino, IMHO, is the pull of God. All that "being present" is a glimpse of what heaven must be like. The noise and worry is gone, and all you have to do is be there. With God Almighty herself.