Yes, I think we should keep this thread going. I have a few times... while trying to fill my empty evenings thought about starting a website a bit like Mumsnet (...used to be... small!!) for Boarding School parents as I never could find one and used to do endless googling when I was missing them so much. I didn't find too much that was helpful... lots of Boarding School Syndrome... very scary that.
I do think as the Mum you do have to be really on board with it. If you are not it will be really hard. I cried alot and pretty near had a break down. (Lots else was going on as well, my life changed drastically). This made it very hard for the kids and my husband as I constantly wanted to bring them home and change it. I am finally on board with it, but it has taken 2 years, and alot of talking and a bit of meds too.
Be sure it is what you want before you get caught up in it. It is hard to go back... unless for financial reasons. If you have only one child it will be a massive change. You cannot really prepare for that. It is all very well people saying keep busy but to me I really did feel grief stricken. I was obsessive about it.
The trouble is now that with the older ones gone the younger ones want to go as they don't want to be stuck at boring home with a Mum (who is crying and missing the others!).
It is alot to think about. Be sure you really like the school and it is what you want for your child and your life. Be sure when you look at the 6th formers you think, 'Yes, I would be proud if my child turned out like them'.
Also be sure you can bear the drive. You will do it alot. If it is further than an hour make sure there are public transport possibilities too.
Finally remember that your childs friends will be spread far and wide too. When they get invited to a party 2 hours away........... Well.....