It might be worth taking a 1 week pass and taking a couple of rest days in between. After 3 full days morning to night exploring temples, they all start to look the same and you lose you appreciation for them. And maybe you can take a hike out to the temples that are further afield.

I loved Bayon. And Ta Prohm. Angkor, while being the biggest and most famous, was not nearly the most interesting.

Best tip: Don’t use dollars. You can’t get change for $1 but you can buy stuff in riel for much less than a dollar. But if you’re not backpacking around several countries at the time, you may not really care.