I would and I have. DS missed a week of school for a WDW trip when he was in 6th grade. It was a trip celebrating my father's being cancer-free, and he and my mom treated DH, DS and I, as well as my brother's family to a week at WDW.
I explained the situation to his teachers, and they were all on board. I did not try to 'sell' the trip as educational, and I knew he would not get any work until we got back.
It took him about a week to fully catch up, with only having to stay after school 2 days that week.
OP--you know your child, and how she'd cope with missing an entire week's worth of instruction. For us, we knew DS would have to work, and we would have to help him, so the trip was worth it to us!