The Summer Palace is a Qing imperial garden built around a lake that was meant to feel larger than Beijing. That is why a private tour here is a routing job, not a hall-by-hall lecture. You arrive at a park edge, pass a ticket and bag check, and then choose which shoreline you will actually walk. A good guide spends the first ten minutes looking at your shoes, the weather, and how you reacted to the first flight of steps — then drops half the pavilions from the mental list.
We plan this day as Yiheyuan only unless you ask for the Old Summer Palace ruins as a second park. Mixing the two without saying so is how travelers end a day angry at the wrong ruins. The surviving garden has water, painted beams, and a hill with a tower. The ruin park has broken stone and a different ticket. Both can be worthwhile. They are not interchangeable.
A private vehicle matters because the useful gates are not the ones a first-time visitor would pick from a subway map. East-gate mornings are common; north-gate exits can save a tired group. We decide that with you, not with a laminated loop that ignores your hotel in Sanlitun or a late lunch you already booked.