I have a friend who's planning a trip to Machu Picchu later this year. They asked me for some advice about access to the site and booking tours in specific time slots, but South America is the one inhabited continent I've never visited, so I'm a little thin on Peru travel lore.

If you have experience traveling in Peru, or specifically to Machu Picchu, and are willing to help my friend out, please leave me a note in comments so I can hook you up.