the information on the other mail below is verry helpful and complete but is missing 1 thing

i did this year the amazing incatrail with an agency PERUPLANET in cusco and they gave me the oficial incatrail website where you can see yourself iff there are still some permits for the trail left , for the day you prefere
http://www.inc-cusco.gob.pe/frame/index_consultas.php

Enjoy your search for a good incatrail operator and for sure enjoy the incatrail !!!!oficial incatrail site peruplanet