Hi Sarah,
I'm not sure about your day to day itinerary but so far as the sunrise/sunset were concerned we drove up to Siem Reap on 10 November. A leisurely day watching the countryside roll past.
You need a photo pass to enter the temples & we stopped en-route to the hotel to do this. They take your pic & the cost is covered in the cost of the trip.
Next morning, 11t November, it was awake at 4.15am for a 5.00am departure for the sunrise. Well worth it. Times might vary depending on the time of the sunrise.
Then back to the hotel for breakfast.
Then we headed out again firstly to Angkor Thom & then on to Ta Prohm.
A break for lunch & then to Angkor Wat. The group split up a bit after the main tour here with some going back to the hotel using the coach & the rest doing the sunset and making our own way back using tuk tuks.
The temple passes are valid for 3 days so you need to do all temples within that time scale.
They might change things on a day to day basis but that was how it was for us.
Best, Ian