Thumbs up to the OP for giving his/her child the opportunity to explore the world. We are a family who loves to travel as well and you have no idea how much the other parents (similar to posters here) in our son's class fret and fume!!!
We or our son and his teachers have never had problems with missing school due to vacations as we have informed the teacher ahead of time. The teachers have planned for the school/home work and let us know what needs to be done while we are out. My son also submits a detailed trip report. We just got back from a gorgeous 3 week Dec. vacation in South America!! The coursework for 3rd grade AAP is not so significantly higher than 3rd grade non-AAP that your daughter will have to curtail all her after-school and weekend activities! Of course, it is higher than 2nd grade (it better be!!!

), but again, if your daughter can handle it, I would say go for it! At least I do, and I don't give a fig for all the tiger moms at school and on this board!
To some of the posters here, the OP is not asking for your opinion on whether his/her daughter should be missing school for vacations! You can keep your smart alecky and envious comments, and the trip recommendations to yourself!! The questions, very simply, are:
1. Do 3rd grade AAP teachers frown on students missing school due to vacations?
2. Is the school workload and homework for 3rd grade AAP significantly higher than 3rd grade non-AAP?
3. And how is it compared to 2nd grade which we think is extremely light (and my daughter finds it easy)?
If you don't have answers to those three questions. then just zip it! Geography, history, culture, tradition, etc is also a part of a child's overall development; it doesn't always have to be math and science all the time!!