I'm not sure I'd feel comfortable taking off during the year anymore, especially with the new common core standards, etc, but I do think there is a double standard going on.  There are many parents (in other threads, not saying here) that think nothing of taking their kids out, especially in elementary school (I'm a 5th grade teacher) because it's "easy" for them to make it up.  Teachers put a lot of work into their daily lessons.  Just because I can hand you a packet of work for your child to do while s/he is gone on vacation, have him/her keep a journal, etc, doesn't mean that's what we're doing in class.  We have one textbook in our curriculum...our 
social studies book.  Science is mostly hands-on, our math curriculum is very much day by day as we move through the new common core standards.  Not that my plans are day by day, but this is completely new curriculum, so we may move through something quickly, or it may take three days or more to learn a new concept. 
I'm very conscious of the fact that having a sub is not the same as me being in the classroom.  If I have to be gone (twice this year....once (one day) w/ my friend in October because I was signed up for the ToT 10-miler and once (one day) because my son's wedding was the next day - 2 hours away), my plans take an extremely long time to write...especially if I don't know who my sub is.  I work in a small enough district that I can ask if a particular sub is available.  Some of our subs are retired teachers and they are excellent.  Of course that doesn't count the full days and half days that the district gets subs for us when we have grade level meetings, curriculum meetings, leadership meetings etc, during school.  Ugh...I'd MUCH rather be w/ my students than sitting in a meeting.
I guess what I'm trying to say is that, while I don't think I could ever take 4-5 days off again for a vacation...things are so different now than they were 18 years ago when my husband and I went to WDW for our 15th anniversary...AND I worry about my students way too much while I'm gone, it just seems like many parents disregard what we're doing in school because their kids need family time, but that same consideration isn't given to teachers.  I chose my job. I absolutely love my job.  But that doesn't mean it wouldn't be nice every few years or so, to take a vacation to Disney (or Universal 

) at a time when prices and crowds aren't thru the roof.