We take our kids out of school and have never had a problem from administration or teachers. Who would really have a problem with a family spending some time together making memories that will last a lifetime.
Further more, I believe that teachers typically should have lesson plans done about 30 days before the actual lesson. Shouldn't they be turning them in to their principal for approval. It is not like teacher is free to just wing it every day?
The board of education is not going to far! That is what it is there for.
Communicate with the school and the teachers for every grade. I think most will find it isn't problem.