We arrived in Cusco around the Christmas holidays and had one day to fill. On Christmas Eve, we were able to set up a tour for the very next day. The tour included an hour van ride into Sacred Valley and 4 hours of ATV time at a very competitive price. If you want to see certain ruins, it may help to have the tourist pass beforehand, but we chose not to enter any of the Inca sites and just rode around farmland, with amazing lake and mountain views. Our guide was excellent and the owner was very nice as well.