I was surprised to learn from my daughter's kindergarten teacher that kindergarten was not mandatory in NY. I had thought it was. She said a child is required to be in school according to state law at a later age.
Anyway, I hope your kindergarten teacher is reasonable. I imagine there might be ways to tie in some relevant skill or focus while on your vacation such as what the one family did with the Mexican artifact while studying Spanish.
My daughter's kindergarten is forever reminding parents that the children are just 5 years old. She thinks learning should be fun.
I am not fearful of taking my daughter out for a break this year. Next year, I do not imagine I will be as comfortable doing it. I think, if my daughter sees a video reinforcing nutrition or sees some animals on a Safari, it is part of her education.
What I worry about is setting a precedent for not going to school in the future. I hope I can set reasonable expectations for school and it's import. This year, I think I can get her work in advance (she has a writing book where she copies the day, date, and weather) and look for tie ins such as the countries (her school focuses on geography, dinasaurs, how plants grow, various animals, the senses, music, putting on plays, among other things.
I hope my note gives you something to think about.
KIS