Susan
I want to reassure you everyone was not affected by the altitude but why chance it when the oxygen is so nice. I would imagine Regent will have you stay at the only hotel in Machu Picchu, Sanctuary Lodge, rather than in the village below. The park opens at sunrise, a magical time of day there.
We combined our 10 day trip in Peru with the Galapoges & it was awesome but I was fearful the whole time of becoming seasick due to the tiny ship.
The Amazon is going to be amazing too. Let's plan on meeting. How are you at Trivia?
Jackie