Hi - that's a good idea if everyone in your group had the same cabin catagory - otherwise it might not work out so well. If you were in a balcony and your kids in an inside - even across the hall - the boarding times could be different.
I think there should be a separate line for those boarders that need assistance and those with children. Kids don't understand the the long waits and anyone with a physical impairment could suffer from the wait as well.
Those areas could supply seating for those that need it and Moms or Dads to keep the kids happy. One small area shouldn't take that much space - but there would have to be firm rules - or it would be just like handicapped parking - and we all know how well that goes
Angel - I see you are a Canuck as well - what province? eh!