I am envious of your trip. I would love to do something like that. A friend of mine did it in sections over a few years, but availed herself of some of the road detours that parallel the trail. I think she used a road bike but am not sure.

There are many, many books about the subject, and I'd be sure to read a couple of them before you go.

And finally, if you have not seen the movie "The Way" I would heartily recommend it. You can watch it on Instant Video at Amazon for $2.99. Hmm, I just might watch it again. For all I know, this movie may have been what inspired you to take this trip in the first place. Good luck and godspeed!