I've spent 3 to 4 months in a small village in Mexico on a number of occasions, and I have always packed all of the hair products I need for the whole time. It's very hard to get personal hygiene and grooming items in that village - one year I couldn't even find a toothbrush!
I wouldn't take the chance of not being able to find what I need - I'd pack the works just to be on the safe side.
CG since June/09
3a/b extremely thick, coarse, porous
Loving AOHR, Biolage Conditioning Balm, KCCC.