We did
ABD Peru some years back. They had an early train from Cusco to get us there near opening time and had an amazing time.
Remember - they limit the number of visitors per day to 2500 and 500 for the Inca Trail, which requires a Peruvian guide, and there are essentially only two entrance times. Tickets are required and sell out. ABD made the most of the time for us, with some guided time, a meeting with an expert who walked us through the main sections with more information than I thought was possible, and then led those who wanted to hike to the Inca gate. We did that, and also had time to explore on our own. On our own we were repeatedly told by M/P staff that the areas we wanted to explore were "off limits" even though there were no such signs. We were on time, but the last of our group to depart. We chose a high point and laid in the sun for awhile. Remarkable. We felt the added surprises and expertise of the guide/director made every minute worthwhile, and we did not feel rushed. Comparing notes with friends who did this several years later and had a little more time than we did, they were totally unaware of about half of what we did and knew. Quality v. Quantity. You decide.