I recently did the Inca trail hike to Machu Picchu - which was a 4 day trek passing through the most amazing terrain that changed almost hourly - and was always extraordinary. And as we hiked, we were treated like royalty from our tour guide and porters. We went with Alpaca Expeditions - and our guide Raul woke us every morning with some tea served to our tents, our chef made us the most amazing meals and we were taught about the life of the Incas and how the current Andean people live today. We were only responsible for a small day pack and to enjoy each and every minute of the trail. There are smaller Inca ruins to run around each day - and you have them all to yourself, making them even more fun than Machu Picchu, which is amazing, but extremely crowded.
I am sure that taking the train to Machu Picchu is lovely, but there is nothing that will beat this 4 day adventure that is an amazing accomplishment that we all can conquer. And choose the Alpaca team to go with - you will not be treated better.