From a Middle school teacher's perspective, I would be appalled if a parent asked me for a week's worth of work ahead of time. Also, with all the time we get out of school each year, I would also be appalled if they missed a week of school. The reason I say this about the work is, it is a HUGE inconvenience to get make-up work ahead of time together. What we might do from day to day could change depending on what teachable moments come up in the classroom. Also, I may not have everything ready for the upcoming week bc I don't always have a planning period to get ahead that much.
The reason it would appall me, is because I am a middle school teacher. Things are way different in middle school than in elementary school. Also, I can see missing a day or two, but a whole week?
I understand that people want to avoid crowds, and go when it is cheaper, but, I don't think that is always what is best for the child. I just don't think it always sends the best message to the kids. It isn't about the work, or the grades, or their ability to catch up. In the big scheme of "life" no it probably will not matter that they missed a week of school, however it is a life lesson that is being taught. Sort of "the rules don't apply to me type of thing."
Ok, I am prepared to be flamed for this!
Sorry, I am sure this is not what people want to hear....
Just as an aside...it is sometimes about "the only way it will ever happen", not just choice...we could NEVER afford to be able to go during peak season...I almost pass out just SEEING the dollar amounts! It can also be about health. I'd end up in the hospital if we went during the summer....
As I said in another answer...our family found out the hard way that life is too short (we lost a son, our girls lost their brother), and so it's not about "the rules don't apply to us" but- "the rules DO apply, so you'll have to make it up, but it'll be worth it!"
We all have different talents and skill sets and thank God for that 
I would have been fighting that as her parent, I think.