Me too LB. Always astonished at how certain everyone is on these threads.
One does the best one can, but I imagine that, sometimes, dumping 2 toddlers on another family is just not possible. There might be something else coming up, and the one who doesn't have rellies/is lone parent/has dp who works 24/7 might feel that she just can't impose on her friend, again.
At which point, I'd probably think, ach onebat, don't be silly - all of these people at the school meeting have had children, they're not going to suddenly turn into sour-faced, judgmental prigs overnight, are they? Of course not! And I'd take the toddlers, because it would be either that, or let the older child down by not attending the meeting.