We took the Inca Trail with a guide company (mandatory in Peru). 3 nights/4 days. Manchu Picchu is awesome but the hike there made the trip worth it. Certain sections are straight out of Indiana Jones. You also see MP from the Sun Gate prior to and at sunrise, which isn't accessed by the group's that don't enter using the Inca trail. ...but yeah, agree with above, all the tour buses are insane - not just to MP. Unfortunately, there's a number of these accidents every year.