+ 1 to the Tim Moore book.
(though gave up on his Donkey powered Camino book - I found the jokes too forced - that's what comes of leaving the bike behind)
I can recommend this.http://www.amazon.co.uk/Touring-Surviva ... ival+guide
Not a travelogue but you will learn more from it than reading several travelogues about the practicalities.
Answers lots of sensible questions (even stupid ones - stupid questions are often the best) you will have thought of, some you will have thought of but were too embarrassed to ask and some you maybe haven't thought of but should have done.
But no worries they will ask and answer them for you.
With this on a Kindle you could prepare for a trip in no time and if you take it with you will have a ready reference for comfort and advice along the way.