I am a kindergarten teacher and I wish I could leave school to go to Disney.( I always wonder how parents would take it if the teacher said she was leaving for a vacation! LOL!) I do appreciate being told as soon as possible that your child is going however.
Please remember that make-up work is not the same as the teacher teaching the material. And true, missing school for one week won't kill them. My older kids don't want to be pulled out now due to the massive amount of make-up work that they would have to finish.
Please stop fretting about all of this. If you want to go on a vacation, go. Deal with the make-up work , buy the teacher a little gift for when you come back and have fun. Do teachers love when kids miss school for any reason other than illness, no. But, we are people too and will understand. Kindergarten is an important year of total learning, but one week won't be a big impact. Just remember every grade higher your child gets means that he/she probably won't want to leave school to go to Disney. Enjoy !