Part of my itinerary is:
Thursday: Bus arrives in Cusco at approximately 7:40am. No transportation reserved yet. Sleep in Ollantaytambo.
Friday: Machu Picchu site ticket already purchased. This isn't the main point of the question but I picked the 1pm time slot, and I picked the train ticket that says to arrive at the station by 7:59am and to arrive at the train station in Aguas Calientes at 5:50pm. Sleep in Ollantaytambo a 2nd night
Saturday: no transportation reserved yet. Sleep in Cusco.

Should a reserve a taxi to take me to various sacred valley ruins on the way to from the bus station in Cusco to Ollantaytambo, OR on the way from my hotel in Ollantaytambo to Cusco on the Saturday after Machu Picchu? Is it better to see the site in Ollantaytambo the day I arrive or the day I leave?