Minimum two days if you're doing Machu Picchu as a day trip from Cusco. If you want to trek, allow 4-5 days total - many travelers book multi-day itineraries that loop through the valley, Cusco, and the mountain. Even one extra day in the valley itself (visiting markets, smaller ruins, or doing a shorter trek) changes the experience completely.

May through September is the dry season - clearest views, most stable weather, and the most crowded trails. December through March is wet but dramatically greener, fewer tourists, and cheaper. Check before you go since weather can shift quickly at this altitude.

Yes, especially for the Inca Trail and other 4-day treks, which fill up weeks ahead in high season. Even day trips to Machu Picchu run regularly, but booking ahead guarantees your spot and often gets you better pricing. Last-minute options exist but your choice of dates and tour type narrows significantly.

Absolutely. A guide transforms what you see - the history of the sites, where water channels run, which terraces are ceremonial - goes way beyond what a solo visit offers. Most travelers book guided experiences rather than going solo, which tells you something about how much context matters at these altitudes and archaeological sites.

Typically accommodation, some meals, transportation between sites, and guide services. Check before you book because accommodations range from basic hostels to comfortable lodges, and what's included varies. Train tickets to Machu Picchu often cost extra even on guided tours.

Most organized tours handle transport. If you're piecing it together, roads connect towns but many travelers use the scenic train from Cusco for convenience. Local buses exist but guided tours streamline the logistics, especially if you're acclimatizing to the altitude.

Day trips to Machu Picchu work for families - the train is comfortable and the site has uneven but walkable paths. Multi-day treks are strenuous and high-altitude; check with operators about what's realistic for your group. Those with mobility concerns should confirm accessibility details with tour providers before booking.