So, it's been my opinion through all of this that while some kids will be behind, we were most of the way through the school year, and there has been a substantial amount of distance learning going on (at least in my district). I personally think they should stick to the schedule they have and handle the kids/classes that need additional assistance on a case by case basis. Unless a kid completely checked out for the last two months (and I realize some have done that), no one should be so far behind.
My son is in high school, and while some content has been cut, he certainly isn't "behind". The content that's been eliminated can be made up, and it's not anything that will affect his ability to graduate or get into college.
But I don't think the extra days are for catch up. I think they are trying to build extra time into the schedule because they expect a second wave of infections that will close schools again.
As far as the schedule goes, vacation is an issue, but it's also so much more than that. My son is also in band, so we are already beholden to that schedule for the year, which means we can't even take long weekends to visit family that lives an hour away. No school schedule means no band schedule, which leaves a lot up in the air.
My son is in Boy Scouts, too, and thankfully he's already done Philmont, but a change to the school schedule affects Sea Base. And those reservations are made over one year out (although, I suspect that is all on hold right now).
I am also a single mom, so no school schedule complicates visitation. The idea of only having the month of July off next summer is concerning because, legally, he's supposed to spend a month with his dad - which would mean no Sea Base or any other type of vacation for him. And it might not even be a full month because band camp usually starts the last Monday in July. Obviously, I can negotiate with his dad, but these are all things that I think about.
These are all first-world problems, I know, but our district has (had?) already put out the calendars for the next TWO years, and given that we are also thinking about ACT/SAT testing and visits to prospective universities, there is a lot of advance planning that has to be done.
It's amazing how many of these activities are planned (and require financial commitments) 1+ year in advance. I didn't even realize it myself until we got into it.
Thinking about it all gives me a headache.