“I guess it’s actually not worth worrying about until I get back decisions on March 10.”
This, times 10.
That said, as a parent with kids at two different boarding schools in day-trip drivable but opposite directions, your parents are not being unreasonable to want both siblings at the same school. It certainly simplifies matters.
For example just this past weekend, we had both girls home (one on an official “post exams” long weekend and the other just because her sister was home). Pickup days were staggered, so that was fairly simple…but come Sunday, both had to be driven back to their respective schools in addition to managing other obligations that we as working parents/community members had.
Here is what my Sunday looked like: got up early to take care of housework/work-work, set up a booth for my wife at a local tradeshow while she was attending church/church meeting, waited for wife to arrive with 7Daughter1, drove 7D1to SAS (2 hour drive) from tradeshow location, drove home (2.5 hour drive), got in passenger seat to accompany wife and 7Daughter2 to Masters (1.5 hours one way). Total drive time on Sunday: about 7.5 hours.
Then consider that there are breaks that won’t sync up, move-in dates that might conflict, etc. I understand that this is what we signed up for, but it ain’t easy.